| myelomeningocele | (noun) a congenital defect of the central nervous system in which a sac containing part of the spinal cord and its meninges protrude through a gap in the vertebral column; frequently accompanied by hydrocephalus and mental retardation | - |
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| myringoplasty | (noun) surgical repair of a perforated eardrum with a tissue graft | - |
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| myringotomy | (noun) surgical incision into the eardrum (to relieve pressure or release pus from the middle ear) | - |
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| negotiant | (noun) someone who negotiates (confers with others in order to reach a settlement) | Synonyms: negotiator, treater |
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| negotiation | (noun) the activity or business of negotiating an agreement; coming to terms | - |
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| (noun) a discussion intended to produce an agreement | Synonyms: dialogue, talks |
| negotiator | (noun) someone who negotiates (confers with others in order to reach a settlement) | Synonyms: negotiant, treater |
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| negotiatress | (noun) a woman negotiator | Synonyms: negotiatrix |
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| negotiatrix | (noun) a woman negotiator | Synonyms: negotiatress |
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| nightgown | (noun) lingerie consisting of a loose dress designed to be worn in bed by women | Synonyms: gown, night-robe, nightdress, nightie |
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| nonagon | (noun) a nine-sided polygon | - |
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| octagon | (noun) an eight-sided polygon | - |
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| oesophagoscope | (noun) an optical instrument for examining the inside of the esophagus | Synonyms: esophagoscope |
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| oligo | (noun) (biochemistry) a polynucleotide whose molecules contain relatively few nucleotides | Synonyms: oligonucleotide |
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| oligochaete | (noun) hermaphroditic terrestrial and aquatic annelids having bristles borne singly along the length of the body | Synonyms: oligochaete worm |
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| oligoclase | (noun) any of a series of triclinic feldspars that form rocks | Synonyms: plagioclase |
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| oligodactyly | (noun) congenital condition in which some fingers or toes are missing | - |
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| oligodendria | (noun) tissue consisting of glial cells with sheetlike processes that form the myelin sheath of nerve fibers | Synonyms: oligodendroglia |
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| oligodendrocyte | (noun) a cell of the oligodendroglia | - |
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| oligodendroglia | (noun) tissue consisting of glial cells with sheetlike processes that form the myelin sheath of nerve fibers | Synonyms: oligodendria |
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| oligodontia | (noun) congenital condition in which some of the teeth are missing | - |
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| oligomenorrhea | (noun) abnormally light or infrequent menstruation | - |
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| oligonucleotide | (noun) (biochemistry) a polynucleotide whose molecules contain relatively few nucleotides | Synonyms: oligo |
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| oligopoly | (noun) (economics) a market in which control over the supply of a commodity is in the hands of a small number of producers and each one can influence prices and affect competitors | - |
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| oligosaccharide | (noun) any of the carbohydrates that yield only a few monosaccharide molecules on complete hydrolysis | - |
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| oligospermia | (noun) insufficient spermatozoa in the semen | - |
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| operagoer | (noun) a patron of the opera | - |
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| orthogonality | (noun) the quality of lying or intersecting at right angles | - |
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| (noun) the relation of opposition between things at right angles | Synonyms: orthogonal opposition, perpendicularity |
| otolaryngologist | (noun) a specialist in the disorders of the ear or nose or throat | Synonyms: ear-nose-and-throat doctor, ENT man, otorhinolaryngologist, rhinolaryngologist |
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| otolaryngology | (noun) the medical specialty that deals with diseases of the ear, nose and throat | Synonyms: otorhinolaryngology, rhinolaryngology |
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| otorhinolaryngologist | (noun) a specialist in the disorders of the ear or nose or throat | Synonyms: ear-nose-and-throat doctor, ENT man, otolaryngologist, rhinolaryngologist |
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| otorhinolaryngology | (noun) the medical specialty that deals with diseases of the ear, nose and throat | Synonyms: otolaryngology, rhinolaryngology |
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| outgo | (noun) money paid out; an amount spent | Synonyms: expenditure, outlay, spending |
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| outgoer | (noun) someone who leaves one country to settle in another | Synonyms: emigrant, emigre, emigree |
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| pagoda | (noun) an Asian temple; usually a pyramidal tower with an upward curving roof | - |
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| palatopharyngoplasty | (noun) surgical resection of unnecessary palatal and oropharyngeal tissue to open the airway; intended to cure extreme cases of snoring (with or without sleep apnea) | Synonyms: PPP, UPPP, uvulopalatopharyngoplasty |
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| pangolin | (noun) toothless mammal of southern Africa and Asia having a body covered with horny scales and a long snout for feeding on ants and termites | Synonyms: anteater, scaly anteater |
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| paragon | (noun) an ideal instance; a perfect embodiment of a concept | Synonyms: beau ideal, idol, perfection |
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| (noun) model of excellence or perfection of a kind; one having no equal | Synonyms: apotheosis, ideal, nonesuch, nonpareil, nonsuch, saint |
| paragonite | (noun) a colorless or pale brown mica with sodium | - |
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| paregoric | (noun) medicine used to treat diarrhea | Synonyms: camphorated tincture of opium |
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| partygoer | (noun) someone who is attending a party | - |
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| pedagog | (noun) someone who educates young people | Synonyms: educator, pedagogue |
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| pedagogics | (noun) the principles and methods of instruction | Synonyms: pedagogy, teaching method |
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| pedagogue | (noun) someone who educates young people | Synonyms: educator, pedagog |
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| pedagogy | (noun) the profession of a teacher | Synonyms: instruction, teaching |
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| (noun) the activities of educating or instructing; activities that impart knowledge or skill | Synonyms: didactics, education, educational activity, instruction, teaching |
| (noun) the principles and methods of instruction | Synonyms: pedagogics, teaching method |
| pendragon | (noun) the supreme war chief of the ancient Britons | - |
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| pengo | (noun) formerly the basic unit of money in Hungary until it was replaced by the forint in 1946 | - |
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| pentagon | (noun) a five-sided polygon | - |
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| pergola | (noun) a framework that supports climbing plants | Synonyms: arbor, arbour, bower |
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| perigon | (noun) an angle of 360 degrees | Synonyms: round angle |
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| perigone | (noun) collective term for the outer parts of a flower consisting of the calyx and corolla and enclosing the stamens and pistils | Synonyms: chlamys, floral envelope, perianth, perigonium |
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| perigonium | (noun) collective term for the outer parts of a flower consisting of the calyx and corolla and enclosing the stamens and pistils | Synonyms: chlamys, floral envelope, perianth, perigone |
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| phagocyte | (noun) a cell that engulfs and digests debris and invading microorganisms | Synonyms: scavenger cell |
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| phagocytosis | (noun) process in which phagocytes engulf and digest microorganisms and cellular debris; an important defense against infection | - |
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| phantasmagoria | (noun) a constantly changing medley of real or imagined images (as in a dream) | - |
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| phlogopite | (noun) a brown form of mica consisting of hydrous silicate of potassium and magnesium and aluminum | - |
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| pibgorn | (noun) an ancient (now obsolete) single-reed woodwind; usually made of bone | Synonyms: hornpipe, stockhorn |
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| pichiciago | (noun) very small Argentine armadillo with pale silky hair and pink plates on head and neck | Synonyms: chlamyphore, Chlamyphorus truncatus, fairy armadillo, pichiciego |
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| pichiciego | (noun) very small Argentine armadillo with pale silky hair and pink plates on head and neck | Synonyms: chlamyphore, Chlamyphorus truncatus, fairy armadillo, pichiciago |
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| playgoer | (noun) someone who attends the theater | Synonyms: theatergoer, theatregoer |
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| plumbago | (noun) any plumbaginaceous plant of the genus Plumbago | - |
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| (noun) used as a lubricant and as a moderator in nuclear reactors | Synonyms: black lead, graphite |
| pogonia | (noun) any hardy bog orchid of the genus Pogonia: terrestrial orchids having slender rootstocks and erect stems bearing one or a few leaves and a solitary terminal flower | - |
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| pogonion | (noun) the craniometric point that is the most forward-projecting point on the anterior surface of the chin | - |
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| pogonip | (noun) a dense winter fog containing ice particles | Synonyms: ice fog |
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| pogonophoran | (noun) slender animal with tentacles and a tubelike outer covering; lives on the deep ocean bottom | Synonyms: beard worm |
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| polygon | (noun) a closed plane figure bounded by straight sides | Synonyms: polygonal shape |
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| polymastigote | (noun) flagellates with several flagella | - |
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| prolegomenon | (noun) a preliminary discussion inserted at the beginning of a book or treatise | - |
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| protagonism | (noun) active support of an idea or cause etc.; especially the act of pleading or arguing for something | Synonyms: advocacy |
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| protagonist | (noun) a person who backs a politician or a team etc. | Synonyms: admirer, booster, champion, friend, supporter |
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| (noun) the principal character in a work of fiction | Synonyms: agonist |
| prurigo | (noun) chronic inflammatory disease of the skin characterized by blister capped papules and intense itching | - |
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| pteropogon | (noun) southern Australian plant having feathery hairs surrounding the fruit | Synonyms: Pteropogon humboltianum |
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| pycnogonid | (noun) any of various small spiderlike marine arthropods having small thin bodies and long slender legs | Synonyms: sea spider |
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| quango | (noun) a quasi nongovernmental organization; an organization that is financed by the government yet acts independently of the government | Synonyms: quasi-NGO |
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| ragout | (noun) well-seasoned stew of meat and vegetables | - |
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| ravigote | (noun) veloute sauce seasoned with chopped chervil, chives, tarragon, shallots and capers | Synonyms: ravigotte |
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| ravigotte | (noun) veloute sauce seasoned with chopped chervil, chives, tarragon, shallots and capers | Synonyms: ravigote |
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| regosol | (noun) a type of soil consisting of unconsolidated material from freshly deposited alluvium or sand | - |
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| rhinolaryngologist | (noun) a specialist in the disorders of the ear or nose or throat | Synonyms: ear-nose-and-throat doctor, ENT man, otolaryngologist, otorhinolaryngologist |
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| rhinolaryngology | (noun) the medical specialty that deals with diseases of the ear, nose and throat | Synonyms: otolaryngology, otorhinolaryngology |
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| rigor | (noun) something hard to endure | Synonyms: asperity, grimness, hardship, rigorousness, rigour, rigourousness, severeness, severity |
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| (noun) the quality of being valid and rigorous | Synonyms: cogency, rigour, validity |
| (noun) excessive sternness | Synonyms: hardness, harshness, inclemency, rigorousness, rigour, rigourousness, severeness, severity, stiffness |
| rigorousness | (noun) something hard to endure | Synonyms: asperity, grimness, hardship, rigor, rigour, rigourousness, severeness, severity |
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| (noun) excessive sternness | Synonyms: hardness, harshness, inclemency, rigor, rigour, rigourousness, severeness, severity, stiffness |
| rigour | (noun) something hard to endure | Synonyms: asperity, grimness, hardship, rigor, rigorousness, rigourousness, severeness, severity |
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| (noun) the quality of being valid and rigorous | Synonyms: cogency, rigor, validity |
| (noun) excessive sternness | Synonyms: hardness, harshness, inclemency, rigor, rigorousness, rigourousness, severeness, severity, stiffness |
| rigourousness | (noun) something hard to endure | Synonyms: asperity, grimness, hardship, rigor, rigorousness, rigour, severeness, severity |
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| (noun) excessive sternness | Synonyms: hardness, harshness, inclemency, rigor, rigorousness, rigour, severeness, severity, stiffness |
| rigout | (noun) a person's costume (especially if bizarre) | - |
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| sago | (noun) powdery starch from certain sago palms; used in Asia as a food thickener and textile stiffener | - |
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| sangoma | (noun) a traditional Zulu healer and respected elder | - |
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| sapsago | (noun) a hard green Swiss cheese made with skim-milk curd and flavored with clover | - |
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| scapegoat | (noun) someone who is punished for the errors of others | Synonyms: whipping boy |
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| scattergood | (noun) someone who spends money prodigally | Synonyms: spend-all, spender, spendthrift |
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| schizogony | (noun) asexual reproduction by multiple fission; characteristic of many sporozoan protozoans | - |
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| snapdragon | (noun) a garden plant of the genus Antirrhinum having showy white or yellow or crimson flowers resembling the face of a dragon | - |
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| sorgo | (noun) any of several sorghums cultivated as a source of syrup | Synonyms: sorgho, sugar sorghum, sweet sorghum |
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| spigot | (noun) a regulator for controlling the flow of a liquid from a reservoir | Synonyms: faucet |
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| (noun) a plug for a bunghole in a cask | Synonyms: tap |
| stalogometer | (noun) a device for investigating surface tension using the stalagmometric method. | Synonyms: stactometer, stalagmometer |
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| stegosaur | (noun) herbivorous ornithischian dinosaur with a row of bony plates along its back and a spiked tail probably used as a weapon | Synonyms: Stegosaur stenops, stegosaurus |
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| stegosaurus | (noun) herbivorous ornithischian dinosaur with a row of bony plates along its back and a spiked tail probably used as a weapon | Synonyms: stegosaur, Stegosaur stenops |
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| supercargo | (noun) an officer on a merchant ship in charge of the cargo and its sale and purchase | - |
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| superego | (noun) (psychoanalysis) that part of the unconscious mind that acts as a conscience | - |
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| synagogue | (noun) (Judaism) the place of worship for a Jewish congregation | Synonyms: tabernacle, temple |
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| syncategorem | (noun) a syncategorematic expression; a word that cannot be used alone as a term in a logical proposition | Synonyms: syncategoreme |
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