| pneumogastric | (adjective) of or relating to or involving the lungs and stomach | - |
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| (adjective) of or relating to the vagus nerve | Synonyms: vagal |
| (noun) a mixed nerve that supplies the pharynx and larynx and lungs and heart and esophagus and stomach and most of the abdominal viscera | Synonyms: nervus vagus, pneumogastric nerve, tenth cranial nerve, vagus, vagus nerve, wandering nerve |
| pneumonectomy | (noun) surgical removal of a lung (usually to treat lung cancer) | - |
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| pneumonia | (noun) respiratory disease characterized by inflammation of the lung parenchyma (excluding the bronchi) with congestion caused by viruses or bacteria or irritants | - |
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| pneumonic | (adjective) relating to or affecting the lungs | Synonyms: pulmonary, pulmonic |
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| (adjective) pertaining to or characterized by or affected by pneumonia | - |
| pneumonitis | (noun) inflammation of the lungs; caused by a virus or an allergic reaction | - |
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| pneumonoconiosis | (noun) chronic respiratory disease caused by inhaling metallic or mineral particles | Synonyms: pneumoconiosis |
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| pneumothorax | (noun) abnormal presence of air in the pleural cavity resulting in the collapse of the lung; may be spontaneous (due to injury to the chest) or induced (as a treatment for tuberculosis) | - |
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| podetium | (noun) an organ or body resembling a stalk; especially the outgrowth of the thallus of certain lichens on which the ascocarp is borne | - |
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| podium | (noun) a platform raised above the surrounding level to give prominence to the person on it | Synonyms: ambo, dais, pulpit, rostrum, soapbox, stump |
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| polemonium | (noun) any plant of the genus Polemonium; most are low-growing often foul-smelling plants of temperate to Arctic regions | - |
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| pollinium | (noun) a coherent mass of pollen grains (as in orchids) | - |
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| polonium | (noun) a radioactive metallic element that is similar to tellurium and bismuth; occurs in uranium ores but can be produced by bombarding bismuth with neutrons in a nuclear reactor | Synonyms: atomic number 84, Po |
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| pomatum | (noun) hairdressing consisting of a perfumed oil or ointment | Synonyms: pomade |
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| possum | (noun) nocturnal arboreal marsupial having a naked prehensile tail found from southern North America to northern South America | Synonyms: opossum |
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| (noun) small furry Australian arboreal marsupials having long usually prehensile tails | Synonyms: opossum, phalanger |
| possumwood | (noun) medium-sized tree of dry woodlands in the southern and eastern United States bearing yellow or orange very astringent fruit that is edible when fully ripe | Synonyms: American persimmon, Diospyros virginiana |
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| posthumous | (adjective) occurring or coming into existence after a person's death | - |
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| posthumously | (adverb) after death | - |
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| postpartum | (adjective) occurring immediately after birth | Synonyms: postnatal |
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| potassium | (noun) a light soft silver-white metallic element of the alkali metal group; oxidizes rapidly in air and reacts violently with water; is abundant in nature in combined forms occurring in sea water and in carnallite and kainite and sylvite | Synonyms: atomic number 19, K |
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| praesidium | (noun) a permanent executive committee in socialist countries that has all the powers of some larger legislative body and that acts for it when it is not in session | Synonyms: presidium |
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| praetorium | (noun) the tent of an ancient Roman general | Synonyms: pretorium |
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| praseodymium | (noun) a soft yellowish-white trivalent metallic element of the rare earth group; can be recovered from bastnasite or monazite by an ion-exchange process | Synonyms: atomic number 59, Pr |
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| precordium | (noun) the external surface of the body overlying the heart and stomach | - |
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| premium | (adjective) having or reflecting superior quality or value; having a higher price or cost | - |
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| (noun) the amount that something in scarce supply is valued above its nominal value | - |
| (noun) payment or reward (especially from a government) for acts such as catching criminals or killing predatory animals or enlisting in the military | Synonyms: bounty |
| (noun) payment for insurance | Synonyms: insurance premium |
| (noun) a fee charged for exchanging currencies | Synonyms: agio, agiotage, exchange premium |
| (noun) a prize, bonus, or award given as an inducement to purchase products, enter competitions initiated by business interests, etc. | - |
| presidium | (noun) a permanent executive committee in socialist countries that has all the powers of some larger legislative body and that acts for it when it is not in session | Synonyms: praesidium |
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| presumable | (adjective) capable of being inferred on slight grounds | Synonyms: supposable, surmisable |
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| presumably | (adverb) by reasonable assumption | Synonyms: presumptively |
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| presume | (verb) take liberties or act with too much confidence | - |
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| (verb) take to be the case or to be true; accept without verification or proof | Synonyms: assume, take for granted |
| (verb) constitute reasonable evidence for | - |
| (verb) take upon oneself; act presumptuously, without permission | Synonyms: dare, make bold |
| presumption | (noun) a kind of discourtesy in the form of an act of presuming | - |
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| (noun) audacious (even arrogant) behavior that you have no right to | Synonyms: assumption, effrontery, presumptuousness |
| (noun) an assumption that is taken for granted | Synonyms: given, precondition |
| (noun) (law) an inference of the truth of a fact from other facts proved or admitted or judicially noticed | - |
| presumptive | (adjective) affording reasonable grounds for belief or acceptance | - |
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| (adjective) having a reasonable basis for belief or acceptance | - |
| presumptively | (adverb) by reasonable assumption | Synonyms: presumably |
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| presumptuous | (adjective) excessively forward | Synonyms: assuming, assumptive |
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| presumptuously | (adverb) in a presumptuous manner | - |
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| presumptuousness | (noun) audacious (even arrogant) behavior that you have no right to | Synonyms: assumption, effrontery, presumption |
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| pretorium | (noun) the tent of an ancient Roman general | Synonyms: praetorium |
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| primordium | (noun) an organ in its earliest stage of development; the foundation for subsequent development | Synonyms: anlage |
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| procumbent | (adjective) having stems that trail along the ground without putting down roots | - |
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| promethium | (noun) a soft silvery metallic element of the rare earth group having no stable isotope; was discovered in radioactive form as a fission product of uranium | Synonyms: atomic number 61, Pm |
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| promycelium | (noun) the basidium of various fungi | - |
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| promythium | (noun) A section of text that comes before the story. | - |
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| proscenium | (noun) the wall that separates the stage from the auditorium in a modern theater | Synonyms: proscenium wall |
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| (noun) the part of a modern theater stage between the curtain and the orchestra (i.e., in front of the curtain) | Synonyms: apron, forestage |
| protactinium | (noun) a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead | Synonyms: atomic number 91, Pa, protoactinium |
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| prothalamium | (noun) a song in celebration of a marriage | Synonyms: prothalamion |
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| protoactinium | (noun) a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead | Synonyms: atomic number 91, Pa, protactinium |
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| psalterium | (noun) the third compartment of the stomach of a ruminant | Synonyms: omasum, third stomach |
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| pseudopodium | (noun) temporary outgrowth used by some microorganisms as an organ of feeding or locomotion | Synonyms: pseudopod |
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| psyllium | (noun) plantain of Mediterranean regions whose seeds swell and become gelatinous when moist and are used as a mild laxative | Synonyms: fleawort, Plantago psyllium, Spanish psyllium |
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| pterygium | (noun) either of two thickened triangular layers of conjunctiva extending from the nasal edge of the eye to the cornea; it arises from irritation of the pinguecula | - |
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| pudendum | (noun) human external genital organs collectively especially of a female | - |
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| puerperium | (noun) time period following childbirth when the mother's uterus shrinks and the other functional and anatomic changes of pregnancy are resolved | - |
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| puma | (noun) large American feline resembling a lion | Synonyms: catamount, cougar, Felis concolor, mountain lion, painter, panther |
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| pumice | (noun) a light glass formed on the surface of some lavas; used as an abrasive | Synonyms: pumice stone |
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| (verb) rub with pumice, in order to clean or to smoothen | - |
| pummel | (verb) strike, usually with the fist | Synonyms: biff, pommel |
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| pummelo | (noun) southeastern Asian tree producing large fruits resembling grapefruits | Synonyms: Citrus decumana, Citrus grandis, Citrus maxima, pomelo, pomelo tree, shaddock |
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| pump | (noun) a mechanical device that moves fluid or gas by pressure or suction | - |
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| (noun) a low-cut shoe without fastenings | - |
| (noun) the hollow muscular organ located behind the sternum and between the lungs; its rhythmic contractions move the blood through the body | Synonyms: heart, ticker |
| (verb) question persistently | - |
| (verb) deliver forth | - |
| (verb) operate like a pump; move up and down, like a handle or a pedal | - |
| (verb) raise (gases or fluids) with a pump | - |
| (verb) draw or pour with a pump | - |
| (verb) flow intermittently | - |
| (verb) move up and down | - |
| (verb) supply in great quantities | - |
| pumped | (adjective) tense with excitement and enthusiasm as from a rush of adrenaline | Synonyms: pumped-up, pumped up, wired |
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| pumpernickel | (noun) bread made of coarse rye flour | Synonyms: black bread |
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| pumpkin | (noun) usually large pulpy deep-yellow round fruit of the squash family maturing in late summer or early autumn | - |
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| (noun) a coarse vine widely cultivated for its large pulpy round orange fruit with firm orange skin and numerous seeds; subspecies of Cucurbita pepo include the summer squashes and a few autumn squashes | Synonyms: autumn pumpkin, Cucurbita pepo, pumpkin vine |
| pumpkinseed | (noun) small brilliantly colored North American sunfish | Synonyms: Lepomis gibbosus |
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| punctum | (noun) (anatomy) a point or small area | - |
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| purificatorium | (noun) a white linen cloth which is used to wipe the chalice after each communicant partakes. | Synonyms: emunctorium, purificator |
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| pycnidium | (noun) flask-shaped asexual structure containing conidia | - |
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| pyrethrum | (noun) spring-flowering garden perennial of Asiatic origin having finely divided aromatic leaves and white to pink-purple flowers; source of an insecticide; sometimes placed in genus Chrysanthemum | Synonyms: Chrysanthemum coccineum, painted daisy, Tanacetum coccineum |
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| (noun) white-flowered pyrethrum of Balkan area whose pinnate leaves are white and silky-hairy below; source of an insecticide; sometimes placed in genus Chrysanthemum | Synonyms: Chrysanthemum cinerariifolium, Dalmatia pyrethrum, Dalmatian pyrethrum, Tanacetum cinerariifolium |
| (noun) made of dried flower heads of pyrethrum plants | - |
| pythium | (noun) any fungus of the genus Pythium | - |
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| pyxidium | (noun) fruit of such plants as the plantain; a capsule whose upper part falls off when the seeds are released | Synonyms: pyxis |
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| quadrennium | (noun) a period of four years | - |
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| quadrivium | (noun) (Middle Ages) a higher division of the curriculum in a medieval university involving arithmetic and music and geometry and astronomy | - |
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| quadrumvirate | (noun) a group of four men | - |
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| quantum | (noun) (physics) the smallest discrete quantity of some physical property that a system can possess (according to quantum theory) | - |
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| (noun) a discrete amount of something that is analogous to the quantities in quantum theory | - |
| quinquennium | (noun) a period of five years | - |
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| quorum | (noun) a gathering of the minimal number of members of an organization to conduct business | - |
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| radiothorium | (noun) radioactive isotope of thorium with mass number 228 | Synonyms: thorium-228 |
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| radium | (noun) an intensely radioactive metallic element that occurs in minute amounts in uranium ores | Synonyms: atomic number 88, Ra |
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| rectum | (noun) the terminal section of the alimentary canal; from the sigmoid flexure to the anus | - |
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| recumb | (verb) lean in a comfortable resting position | Synonyms: recline, repose |
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| recumbent | (adjective) lying down; in a position of comfort or rest | Synonyms: accumbent, decumbent |
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| referendum | (noun) a legislative act is referred for final approval to a popular vote by the electorate | - |
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| regnellidium | (noun) small latex-containing aquatic fern of southern Brazil | Synonyms: Regnellidium diphyllum |
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| relatum | (noun) a term in a proposition that is related to the referent of the proposition | - |
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| residuum | (noun) something left after other parts have been taken away | Synonyms: balance, remainder, residual, residue, rest |
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| resume | (noun) short descriptive summary (of events) | Synonyms: sketch, survey |
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| (noun) a summary of your academic and work history | Synonyms: curriculum vitae, CV |
| (verb) take up or begin anew | Synonyms: re-start, restart |
| (verb) return to a previous location or condition | Synonyms: take up |
| (verb) give a summary (of) | Synonyms: sum up, summarise, summarize |
| (verb) assume anew | - |
| resumption | (noun) beginning again | Synonyms: recommencement |
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| reticulum | (noun) the second compartment of the stomach of a ruminant | Synonyms: second stomach |
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| (noun) any fine network (especially one in the body composed of cells or blood vessels) | - |
| rhenium | (noun) a rare heavy polyvalent metallic element that resembles manganese chemically and is used in some alloys; is obtained as a by-product in refining molybdenum | Synonyms: atomic number 75, Re |
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| rheum | (noun) a watery discharge from the mucous membranes (especially from the eyes or nose) | - |
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| rheumatic | (adjective) of or pertaining to arthritis | Synonyms: arthritic, creaky, rheumatoid, rheumy |
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| (noun) a person suffering with rheumatism | - |
| rheumatism | (noun) any painful disorder of the joints or muscles or connective tissues | - |
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| (noun) a chronic autoimmune disease with inflammation of the joints and marked deformities; something (possibly a virus) triggers an attack on the synovium by the immune system, which releases cytokines that stimulate an inflammatory reaction that can lead to the destruction of all components of the joint | Synonyms: atrophic arthritis, rheumatoid arthritis |
| rheumatoid | (adjective) of or pertaining to arthritis | Synonyms: arthritic, creaky, rheumatic, rheumy |
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| rheumatologist | (noun) a physician specializing in rheumatic diseases | - |
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| rheumatology | (noun) the branch of medicine dealing with the study and treatment of pathologies of the muscles or tendons or joints | - |
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| rheumy | (adjective) of or pertaining to arthritis | Synonyms: arthritic, creaky, rheumatic, rheumatoid |
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| (adjective) moist, damp, wet (especially of air) | - |
| rhodium | (noun) a white hard metallic element that is one of the platinum group and is found in platinum ores; used in alloys with platinum | Synonyms: atomic number 45, Rh |
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| rhumb | (noun) a line on a sphere that cuts all meridians at the same angle; the path taken by a ship or plane that maintains a constant compass direction | Synonyms: loxodrome, rhumb line |
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| rhumba | (noun) a folk dance in duple time that originated in Cuba with Spanish and African elements; features complex footwork and violent movement | Synonyms: rumba |
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| (noun) a ballroom dance based on the Cuban folk dance | Synonyms: rumba |
| (noun) syncopated music in duple time for dancing the rumba | Synonyms: rumba |
| (verb) dance the rhumba | Synonyms: rumba |
| roentgenium | (noun) a radioactive transuranic element, with atomic number 111 | Synonyms: atomic number 111, element 111, Rg |
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| rostrum | (noun) beaklike projection of the anterior part of the head of certain insects such as e.g. weevils | Synonyms: snout |
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| (noun) a platform raised above the surrounding level to give prominence to the person on it | Synonyms: ambo, dais, podium, pulpit, soapbox, stump |
| rubidium | (noun) a soft silvery metallic element of the alkali metal group; burns in air and reacts violently in water; occurs in carnallite and lepidolite and pollucite | Synonyms: atomic number 37, Rb |
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| rum | (adjective) beyond or deviating from the usual or expected | Synonyms: curious, funny, odd, peculiar, queer, rummy, singular |
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| (noun) a card game based on collecting sets and sequences; the winner is the first to meld all their cards | Synonyms: rummy |
| (noun) liquor distilled from fermented molasses | - |
| rumba | (noun) a folk dance in duple time that originated in Cuba with Spanish and African elements; features complex footwork and violent movement | Synonyms: rhumba |
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| (noun) a ballroom dance based on the Cuban folk dance | Synonyms: rhumba |
| (noun) syncopated music in duple time for dancing the rumba | Synonyms: rhumba |
| (verb) dance the rhumba | Synonyms: rhumba |
| rumble | (noun) a fight between rival gangs of adolescents | Synonyms: gang fight |
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| (noun) a servant's seat (or luggage compartment) in the rear of a carriage | - |
| (noun) a loud low dull continuous noise | Synonyms: grumble, grumbling, rumbling |
| (verb) to utter or emit low dull rumbling sounds | Synonyms: growl, grumble |
| (verb) make a low noise | Synonyms: grumble |