| membranophone | (noun) a musical percussion instrument; usually consists of a hollow cylinder with a membrane stretched across each end | Synonyms: drum, tympan |
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| mombin | (noun) purplish tropical fruit | - |
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| (noun) common tropical American shrub or small tree with purplish fruit | Synonyms: jocote, mombin tree, Spondias purpurea |
| mumble | (noun) a soft indistinct utterance | - |
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| mumbler | (noun) a person who speaks softly and indistinctly | Synonyms: murmurer, mutterer |
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| mumbling | (noun) ineffectual chewing (as if without teeth) | Synonyms: gumming |
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| (noun) indistinct enunciation | - |
| nierembergia | (noun) any of various plants of the genus Nierembergia having upturned bell-shaped flowers | Synonyms: cupflower |
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| nimbleness | (noun) the gracefulness of a person or animal that is quick and nimble | Synonyms: agility, legerity, lightness, lightsomeness |
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| (noun) intelligence as revealed by quickness and alertness of mind | Synonyms: mental dexterity |
| nimblewill | (noun) slender branching American grass of some value for grazing in central United States | Synonyms: Muhlenbergia schreberi, nimble Will |
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| nimbus | (noun) an indication of radiant light drawn around the head of a saint | Synonyms: aura, aureole, gloriole, glory, halo |
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| (noun) a dark grey cloud bearing rain | Synonyms: nimbus cloud, rain cloud |
| noctambulation | (noun) walking by a person who is asleep | Synonyms: noctambulism, sleepwalking, somnambulation, somnambulism |
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| noctambulism | (noun) walking by a person who is asleep | Synonyms: noctambulation, sleepwalking, somnambulation, somnambulism |
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| noctambulist | (noun) someone who walks about in their sleep | Synonyms: sleepwalker, somnambulist |
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| nombril | (noun) the center point on a shield | - |
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| noncombatant | (noun) a member of the armed forces who does not participate in combat (e.g. a chaplain or surgeon) | - |
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| nonmember | (noun) a person who is not a member | - |
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| numbat | (noun) small Australian marsupial having long snout and strong claws for feeding on termites; nearly extinct | Synonyms: anteater, banded anteater, Myrmecobius fasciatus |
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| number | (noun) an item of clothing | - |
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| (noun) the property possessed by a sum or total or indefinite quantity of units or individuals | Synonyms: figure |
| (noun) a clothing measurement | - |
| (noun) one of a series published periodically | Synonyms: issue |
| (noun) a symbol used to represent a number | Synonyms: numeral |
| (noun) a numeral or string of numerals that is used for identification and may be attached to accounts, memberships, etc. | - |
| (noun) the number is used in calling a particular telephone | Synonyms: phone number, telephone number |
| (noun) a short performance that is part of a longer program | Synonyms: act, bit, routine, turn |
| (noun) the grammatical category for the forms of nouns and pronouns and verbs that are used depending on the number of entities involved (singular or dual or plural) | - |
| (noun) a numbered item in a series | - |
| (noun) a select company of people | - |
| (noun) a concept of quantity involving zero and units | - |
| numbering | (noun) a numbered list | Synonyms: enumeration |
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| numberplate | (noun) a plate mounted on the front and back of car and bearing the car's registration number | Synonyms: license plate |
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| numbers | (noun) an illegal daily lottery | Synonyms: numbers game, numbers pool, numbers racket |
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| numbfish | (noun) any sluggish bottom-dwelling ray of the order Torpediniformes having a rounded body and electric organs on each side of the head capable of emitting strong electric discharges | Synonyms: crampfish, electric ray, torpedo |
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| numbness | (noun) the trait of lacking enthusiasm for or interest in things generally | Synonyms: apathy, indifference, spiritlessness |
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| (noun) partial or total lack of sensation in a part of the body; a symptom of nerve damage or dysfunction | - |
| ombu | (noun) fast-growing herbaceous evergreen tree of South America having a broad trunk with high water content and dark green oval leaves | Synonyms: bella sombra, Phytolacca dioica |
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| ombudsman | (noun) a government appointee who investigates complaints by private persons against the government | - |
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| penumbra | (noun) a fringe region of partial shadow around an umbra | - |
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| perambulation | (noun) a leisurely walk (usually in some public place) | Synonyms: amble, promenade, saunter, stroll |
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| (noun) a walk around a territory (a parish or manor or forest etc.) in order to officially assert and record its boundaries | - |
| perambulator | (noun) a small vehicle with four wheels in which a baby or child is pushed around | Synonyms: baby buggy, baby carriage, carriage, go-cart, pram, pushchair, pusher, stroller |
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| phlebothrombosis | (noun) thrombosis of a vein without prior inflammation of the vein; associated with sluggish blood flow (as in prolonged bedrest or pregnancy or surgery) or with rapid coagulation of the blood | Synonyms: venous thrombosis |
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| plumb | (noun) the metal bob of a plumb line | Synonyms: plumb bob, plummet |
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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 |
| plumber | (noun) a craftsman who installs and repairs pipes and fixtures and appliances | Synonyms: pipe fitter |
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| plumbery | (noun) the occupation of a plumber (installing and repairing pipes and fixtures for water or gas or sewage in a building) | Synonyms: plumbing |
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| plumbing | (noun) measuring the depths of the oceans | Synonyms: bathymetry |
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| (noun) the occupation of a plumber (installing and repairing pipes and fixtures for water or gas or sewage in a building) | Synonyms: plumbery |
| (noun) utility consisting of the pipes and fixtures for the distribution of water or gas in a building and for the disposal of sewage | Synonyms: plumbing system |
| plumbism | (noun) toxic condition produced by the absorption of excessive lead into the system | Synonyms: lead poisoning, saturnism |
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| pocketcomb | (noun) a small comb suitable for carrying in a pocket | Synonyms: pocket comb |
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| preamble | (noun) a preliminary introduction to a statute or constitution (usually explaining its purpose) | - |
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| prothrombin | (noun) a protein in blood plasma that is the inactive precursor of thrombin | Synonyms: factor II |
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| prothrombinase | (noun) coagulation factor that is converted to an enzyme that converts prothrombin to thrombin in a reaction that depends on calcium ions and other coagulation factors | Synonyms: factor X |
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| ramble | (noun) an aimless amble on a winding course | Synonyms: meander |
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| rambler | (noun) a person who takes long walks in the country | - |
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| (noun) a person whose speech or writing is not well organized | - |
| rambotan | (noun) pleasantly acid bright red oval Malayan fruit covered with soft spines | Synonyms: rambutan |
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| (noun) Malayan tree bearing spiny red fruit | Synonyms: Nephelium lappaceum, rambutan, rambutan tree |
| rambutan | (noun) pleasantly acid bright red oval Malayan fruit covered with soft spines | Synonyms: rambotan |
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| (noun) Malayan tree bearing spiny red fruit | Synonyms: Nephelium lappaceum, rambotan, rambutan tree |
| reassembly | (noun) assembling again | Synonyms: refabrication |
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| recombinant | (noun) a cell or organism in which genetic recombination has occurred | - |
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| recombination | (noun) (genetics) a combining of genes or characters different from what they were in the parents | - |
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| (noun) (physics) a combining of charges or transfer of electrons in a gas that results in the neutralization of ions; important for ions arising from the passage of high-energy particles | - |
| reimbursement | (noun) compensation paid (to someone) for damages or losses or money already spent etc. | - |
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| remembering | (noun) the cognitive processes whereby past experience is remembered | Synonyms: memory |
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| remembrance | (noun) the ability to recall past occurrences | Synonyms: anamnesis, recollection |
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| (noun) a recognition of meritorious service | Synonyms: commemoration, memorial |
| resemblance | (noun) similarity in appearance or external or superficial details | - |
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| rhomb | (noun) a parallelogram with four equal sides; an oblique-angled equilateral parallelogram | Synonyms: diamond, rhombus |
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| rhombencephalon | (noun) the posterior portion of the brain including cerebellum and brainstem | Synonyms: hindbrain |
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| rhombohedron | (noun) a parallelepiped bounded by six similar faces (either rhombuses or parallelograms) | - |
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| rhomboid | (noun) any of several muscles of the upper back that help move the shoulder blade | Synonyms: rhomboid muscle |
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| (noun) a parallelogram with adjacent sides of unequal lengths; an oblique-angled parallelogram with only the opposite sides equal | - |
| rhombus | (noun) a parallelogram with four equal sides; an oblique-angled equilateral parallelogram | Synonyms: diamond, rhomb |
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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 |
| rocambole | (noun) European leek cultivated and used like leeks | Synonyms: Allium scorodoprasum, giant garlic, sand leek, Spanish garlic |
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| 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 |
| 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 |
| rumbling | (noun) a loud low dull continuous noise | Synonyms: grumble, grumbling, rumble |
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| samba | (noun) a lively dance from Brazil, with roots from Africa | - |
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| (noun) a form of canasta using three decks of cards and six jokers | - |
| (noun) music composed for dancing the samba | - |
| (noun) large west African tree having large palmately lobed leaves and axillary cymose panicles of small white flowers and one-winged seeds; yields soft white to pale yellow wood | Synonyms: arere, obeche, obechi, Triplochiton scleroxcylon |
| sambar | (noun) a deer of southern Asia with antlers that have three tines | Synonyms: Cervus unicolor, sambur |
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| sambuca | (noun) an Italian liqueur made with elderberries and flavored with licorice | - |
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| sambur | (noun) a deer of southern Asia with antlers that have three tines | Synonyms: Cervus unicolor, sambar |
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| scombroid | (noun) important marine food and game fishes found in all tropical and temperate seas; some are at least partially endothermic and can thrive in colder waters | Synonyms: scombroid fish |
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| scramble | (noun) rushing about hastily in an undignified way | Synonyms: scamper, scurry |
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| (noun) an unceremonious and disorganized struggle | Synonyms: scuffle |
| scrambler | (noun) electronic equipment that makes speech unintelligible during transmission and restores it at reception | - |
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| (noun) a lightweight motorcycle equipped with rugged tires and suspension; an off-road motorcycle designed for riding cross country or over unpaved ground | Synonyms: dirt bike, trail bike |
| (noun) a rapid mover; someone who scrambles | - |
| scumbag | (noun) a person who is deemed to be despicable or contemptible | Synonyms: bum, crumb, dirty dog, git, lowlife, puke, rat, rotter, scum bag, skunk, so-and-so, stinker, stinkpot |
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| scumble | (noun) the application of very thin coat of color over the surface of a picture | - |
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| semblance | (noun) picture consisting of a graphic image of a person or thing | Synonyms: likeness |
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| (noun) an outward or token appearance or form that is deliberately misleading | Synonyms: color, colour, gloss |
| (noun) an erroneous mental representation | Synonyms: illusion |
| shamble | (noun) walking with a slow dragging motion without lifting your feet | Synonyms: shambling, shuffle, shuffling |
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| shambles | (noun) a building where animals are butchered | Synonyms: abattoir, butchery, slaughterhouse |
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| (noun) a condition of great disorder | - |
| shambling | (noun) walking with a slow dragging motion without lifting your feet | Synonyms: shamble, shuffle, shuffling |
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| slumber | (noun) a dormant or quiescent state | - |
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| (noun) a natural and periodic state of rest during which consciousness of the world is suspended | Synonyms: sleep |
| slumberer | (noun) a rester who is sleeping | Synonyms: sleeper |
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| somberness | (noun) a manner that is serious and solemn | Synonyms: graveness, gravity, soberness, sobriety, sombreness |
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| (noun) a feeling of melancholy apprehension | Synonyms: gloom, gloominess, sombreness |
| (noun) a state of partial or total darkness | Synonyms: gloom, sombreness |
| sombreness | (noun) a manner that is serious and solemn | Synonyms: graveness, gravity, soberness, sobriety, somberness |
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| (noun) a feeling of melancholy apprehension | Synonyms: gloom, gloominess, somberness |
| (noun) a state of partial or total darkness | Synonyms: gloom, somberness |
| sombrero | (noun) a straw hat with a tall crown and broad brim; worn in American southwest and in Mexico | - |
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| somnambulation | (noun) walking by a person who is asleep | Synonyms: noctambulation, noctambulism, sleepwalking, somnambulism |
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| somnambulism | (noun) walking by a person who is asleep | Synonyms: noctambulation, noctambulism, sleepwalking, somnambulation |
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| somnambulist | (noun) someone who walks about in their sleep | Synonyms: noctambulist, sleepwalker |
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| steamboat | (noun) a boat propelled by a steam engine | - |
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| streambed | (noun) a channel occupied (or formerly occupied) by a stream | Synonyms: creek bed |
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| stumble | (noun) an unsteady uneven gait | Synonyms: lurch, stagger |
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| (noun) an unintentional but embarrassing blunder | Synonyms: misstep, trip-up, trip |
| stumblebum | (noun) an awkward stupid person | Synonyms: clod, gawk, goon, lout, lubber, lummox, lump, oaf |
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| (noun) a second-rate prize fighter | Synonyms: palooka |
| stumbler | (noun) a walker or runner who trips and almost falls | Synonyms: tripper |
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| (noun) someone who makes mistakes because of incompetence | Synonyms: blunderer, botcher, bumbler, bungler, butcher, fuckup, fumbler, sad sack |
| symbiosis | (noun) the relation between two different species of organisms that are interdependent; each gains benefits from the other | Synonyms: mutualism |
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| symbol | (noun) something visible that by association or convention represents something else that is invisible | Synonyms: symbolic representation, symbolisation, symbolization |
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| (noun) an arbitrary sign (written or printed) that has acquired a conventional significance | - |
| symbolatry | (noun) the worship of symbols | Synonyms: symbol-worship, symbololatry |
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| symbolisation | (noun) the practice of investing things with symbolic meaning | Synonyms: symbolism, symbolization |
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| (noun) something visible that by association or convention represents something else that is invisible | Synonyms: symbol, symbolic representation, symbolization |
| (noun) the use of symbols to convey meaning | Synonyms: symbolization |
| symboliser | (noun) someone skilled in the interpretation or representation of symbols | Synonyms: symbolist, symbolizer |
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| symbolising | (noun) the act of representing something with a symbol | Synonyms: symbolizing |
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| symbolism | (noun) the practice of investing things with symbolic meaning | Synonyms: symbolisation, symbolization |
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| (noun) a system of symbols and symbolic representations | - |
| (noun) an artistic movement in the late 19th century that tried to express abstract or mystical ideas through the symbolic use of images | - |
| symbolist | (noun) a member of an artistic movement that expressed ideas indirectly via symbols | - |
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| (noun) someone skilled in the interpretation or representation of symbols | Synonyms: symboliser, symbolizer |
| symbolization | (noun) the practice of investing things with symbolic meaning | Synonyms: symbolisation, symbolism |
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| (noun) something visible that by association or convention represents something else that is invisible | Synonyms: symbol, symbolic representation, symbolisation |
| (noun) the use of symbols to convey meaning | Synonyms: symbolisation |
| symbolizer | (noun) someone skilled in the interpretation or representation of symbols | Synonyms: symboliser, symbolist |
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| symbolizing | (noun) the act of representing something with a symbol | Synonyms: symbolising |
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| symbology | (noun) the study or the use of symbols and symbolism | - |
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| symbololatry | (noun) the worship of symbols | Synonyms: symbol-worship, symbolatry |
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| tambac | (noun) an alloy of copper and zinc (and sometimes arsenic) used to imitate gold in cheap jewelry and for gilding | Synonyms: tombac, tombak |
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