| acetone | (noun) the simplest ketone; a highly flammable liquid widely used as an organic solvent and as material for making plastics | Synonyms: dimethyl ketone, propanone |
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| acetonemia | (noun) an abnormal increase of ketone bodies in the blood as in diabetes mellitus | Synonyms: ketonemia, ketosis |
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| acetonic | (adjective) of or relating to acetone | - |
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| acetonuria | (noun) excessive amounts of ketone bodies in the urine as in diabetes mellitus or starvation | Synonyms: ketoaciduria, ketonuria |
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| acromyotonia | (noun) myotonia of the extremities only; causes spastic deformity of the hand or foot | - |
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| alcapton | (noun) an acid formed as an intermediate product of the metabolism of tyrosine and phenylalanine | Synonyms: alkapton, homogentisic acid |
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| alcaptonuria | (noun) a rare recessive metabolic anomaly marked by ochronosis and the presence of alkapton in the urine | Synonyms: alkaptonuria |
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| alkapton | (noun) an acid formed as an intermediate product of the metabolism of tyrosine and phenylalanine | Synonyms: alcapton, homogentisic acid |
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| alkaptonuria | (noun) a rare recessive metabolic anomaly marked by ochronosis and the presence of alkapton in the urine | Synonyms: alcaptonuria |
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| amyotonia | (noun) lack of normal muscular tension or tonus | Synonyms: atonia, atonicity, atony |
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| angiotonin | (noun) any of several vasoconstrictor substances (trade name Hypertensin) that cause narrowing of blood vessels | Synonyms: angiotensin, Hypertensin |
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| antilepton | (noun) the antiparticle of a lepton | - |
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| antiproton | (noun) an unstable negatively charged proton; the antiparticle of a proton | - |
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| antonym | (noun) a word that expresses a meaning opposed to the meaning of another word, in which case the two words are antonyms of each other | Synonyms: opposite, opposite word |
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| antonymous | (adjective) of words: having opposite meanings | - |
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| antonymy | (noun) the semantic relation that holds between two words that can (in a given context) express opposite meanings | - |
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| architectonic | (adjective) of or pertaining to construction or architecture | Synonyms: tectonic |
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| architectonics | (noun) the science of architecture | Synonyms: tectonics |
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| astonied | (adjective) filled with the emotional impact of overwhelming surprise or shock | Synonyms: amazed, astonished, astounded, stunned |
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| astonish | (verb) affect with wonder | Synonyms: amaze, astound |
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| astonished | (adjective) filled with the emotional impact of overwhelming surprise or shock | Synonyms: amazed, astonied, astounded, stunned |
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| astonishing | (adjective) so surprisingly impressive as to stun or overwhelm | Synonyms: astounding, staggering, stupefying |
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| (adjective) surprising greatly | Synonyms: amazing |
| astonishingly | (adverb) in an amazing manner; to everyone's surprise | Synonyms: amazingly, surprisingly |
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| astonishment | (noun) the feeling that accompanies something extremely surprising | Synonyms: amazement |
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| asyndeton | (noun) the omission of conjunctions where they would normally be used | - |
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| atonal | (adjective) characterized by avoidance of traditional western tonality | Synonyms: unkeyed |
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| atonalism | (noun) the absence of a key; alternative to the diatonic system | Synonyms: atonality |
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| atonalistic | (adjective) of or relating to atonalism | - |
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| atonality | (noun) the absence of a key; alternative to the diatonic system | Synonyms: atonalism |
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| atonally | (adverb) without tonality | - |
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| atone | (verb) turn away from sin or do penitence | Synonyms: repent |
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| (verb) make amends for | Synonyms: aby, abye, expiate |
| atonement | (noun) the act of atoning for sin or wrongdoing (especially appeasing a deity) | Synonyms: expiation, propitiation |
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| (noun) compensation for a wrong | Synonyms: expiation, satisfaction |
| atonia | (noun) lack of normal muscular tension or tonus | Synonyms: amyotonia, atonicity, atony |
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| atonic | (adjective) (used of syllables) carrying no stress | Synonyms: unaccented |
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| (adjective) characterized by a lack of tonus | - |
| atonicity | (noun) lack of normal muscular tension or tonus | Synonyms: amyotonia, atonia, atony |
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| atony | (noun) lack of normal muscular tension or tonus | Synonyms: amyotonia, atonia, atonicity |
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| automaton | (noun) a mechanism that can move automatically | Synonyms: golem, robot |
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| (noun) a machine that operates on its own without the need for human control | - |
| (noun) someone who acts or responds in a mechanical or apathetic way | Synonyms: zombi, zombie |
| automatonlike | (adjective) resembling the unthinking functioning of a machine | Synonyms: automatic, machinelike, robotic, robotlike |
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| autonomic | (adjective) relating to or controlled by the autonomic nervous system | - |
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| autonomous | (adjective) (of political bodies) not controlled by outside forces | Synonyms: independent, self-governing, sovereign |
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| (adjective) (of persons) free from external control and constraint in e.g. action and judgment | Synonyms: self-directed, self-reliant |
| (adjective) existing as an independent entity | - |
| autonomy | (noun) immunity from arbitrary exercise of authority: political independence | Synonyms: liberty |
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| (noun) personal independence | Synonyms: self-direction, self-reliance, self-sufficiency |
| badminton | (noun) a game played on a court with light long-handled rackets used to volley a shuttlecock over a net | - |
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| barbitone | (noun) a barbiturate used as a hypnotic | Synonyms: barbital, diethylbarbituric acid, diethylmalonylurea, veronal |
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| baritone | (adjective) lower in range than tenor and higher than bass | - |
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| (noun) the second lowest brass wind instrument | Synonyms: baritone horn |
| (noun) the second lowest adult male singing voice | Synonyms: baritone voice |
| (noun) a male singer | Synonyms: barytone |
| bartonia | (noun) annual grown especially for its fragrant golden nocturnal flowers | Synonyms: Mentzelia lindleyi |
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| barytone | (noun) a male singer | Synonyms: baritone |
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| baton | (noun) a thin tapered rod used by a conductor to lead an orchestra or choir | Synonyms: wand |
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| (noun) a hollow cylinder passed from runner to runner in a relay race | - |
| (noun) a hollow metal rod that is wielded or twirled by a drum major or drum majorette | - |
| (noun) a short staff carried by some officials to symbolize an office or an authority | - |
| (noun) a short stout club used primarily by policemen | Synonyms: billy, billy club, billystick, nightstick, truncheon |
| bellybutton | (noun) a scar where the umbilical cord was attached | Synonyms: belly button, navel, omphalos, omphalus, umbilicus |
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| bentonite | (noun) an absorbent aluminum silicate clay formed from volcanic ash | - |
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| bentonitic | (adjective) of or relating to or containing bentonite | - |
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| bettong | (noun) short-nosed rat kangaroo | - |
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| bilestone | (noun) a calculus formed in the gall bladder or its ducts | Synonyms: gallstone |
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| biltong | (noun) meat that is salted and cut into strips and dried in the sun | - |
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| bloodstone | (noun) green chalcedony with red spots that resemble blood | Synonyms: heliotrope |
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| bluestone | (noun) bluish-grey sandstone used for paving and building | - |
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| bluetongue | (noun) a viral disease of sheep and cattle that is transmitted by biting midges | - |
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| botonee | (adjective) (of a heraldic cross) having a cluster of three buttons or knobs at the end of each arm | Synonyms: botonnee |
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| botonnee | (adjective) (of a heraldic cross) having a cluster of three buttons or knobs at the end of each arm | Synonyms: botonee |
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| boutonniere | (noun) a flower that is worn in a buttonhole | - |
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| breakstone | (noun) any of various plants of the genus Saxifraga | Synonyms: rockfoil, saxifrage |
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| brimstone | (noun) an old name for sulfur | Synonyms: native sulfur, native sulphur |
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| brownstone | (noun) a row house built of brownstone; reddish brown in color | - |
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| (noun) a reddish brown sandstone; used in buildings | - |
| button | (noun) a round fastener sewn to shirts and coats etc to fit through buttonholes | - |
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| (noun) an electrical switch operated by pressing | Synonyms: push, push button |
| (noun) a device that when pressed will release part of a mechanism | Synonyms: release |
| (noun) any artifact that resembles a button | - |
| (noun) a specific area or icon in graphical user interface systems that is clicked or pressed in order to select a command or perform an action | - |
| (noun) a female sexual organ homologous to the penis | Synonyms: clit, clitoris |
| (noun) a round flat badge displaying information and suitable for pinning onto a garment | - |
| (noun) any of various plant parts that resemble buttons | - |
| (verb) fasten with buttons | - |
| (verb) provide with buttons | - |
| buttoned | (adjective) furnished or closed with buttons or something buttonlike | Synonyms: fastened |
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| buttonhole | (noun) a hole through which buttons are pushed | Synonyms: button hole |
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| (verb) detain in conversation by or as if by holding on to the outer garments of; as for political or economic favors | Synonyms: lobby |
| buttonhook | (noun) a hook for pulling a button through a buttonhole | - |
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| buttonlike | (adjective) small and round and shiny like a shiny bead or button | Synonyms: beadlike, beady, buttony |
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| buttonwood | (noun) very large spreading plane tree of eastern and central North America to Mexico | Synonyms: American plane, American sycamore, Platanus occidentalis |
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| buttony | (adjective) ornamented with many buttons | - |
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| (adjective) small and round and shiny like a shiny bead or button | Synonyms: beadlike, beady, buttonlike |
| calcitonin | (noun) thyroid hormone that tends to lower the level of calcium in the blood plasma and inhibit resorption of bone | Synonyms: thyrocalcitonin |
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| canton | (noun) a small administrative division of a country | - |
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| (verb) divide into cantons, of a country | - |
| (verb) provide housing for (military personnel) | Synonyms: billet, quarter |
| cantonal | (adjective) of or relating to a canton | - |
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| cantonment | (noun) temporary living quarters specially built by the army for soldiers | Synonyms: bivouac, camp, encampment |
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| capstone | (noun) a stone that forms the top of wall or building | Synonyms: copestone, coping stone, stretcher |
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| (noun) a final touch; a crowning achievement; a culmination | Synonyms: copestone, finishing touch |
| carton | (noun) a box made of cardboard; opens by flaps on top | - |
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| (noun) the quantity contained in a carton | Synonyms: cartonful |
| cartonful | (noun) the quantity contained in a carton | Synonyms: carton |
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| catatonia | (noun) a form of schizophrenia characterized by a tendency to remain in a fixed stuporous state for long periods; the catatonia may give way to short periods of extreme excitement | Synonyms: catatonic schizophrenia, catatonic type schizophrenia |
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| (noun) extreme tonus; muscular rigidity; a common symptom in catatonic schizophrenia | - |
| catatonic | (adjective) characterized by catatonia especially either rigidity or extreme laxness of limbs | - |
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| chalkstone | (noun) a deposit of urates around a joint or in the external ear; diagnostic of advanced or chronic gout | Synonyms: tophus |
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| cherrystone | (noun) a half-grown quahog | Synonyms: cherrystone clam |
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| (noun) small quahog larger than a littleneck; eaten raw or cooked as in e.g. clams casino | Synonyms: cherrystone clam |
| chiton | (noun) primitive elongated bilaterally symmetrical marine mollusk having a mantle covered with eight calcareous plates | Synonyms: coat-of-mail shell, polyplacophore, sea cradle |
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| (noun) a woolen tunic worn by men and women in ancient Greece | - |
| claystone | (noun) fine-grained rock consisting of compacted clay particles | - |
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| clingstone | (noun) fruit (especially peach) whose flesh adheres strongly to the pit | Synonyms: cling |
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| clintonia | (noun) any temperate liliaceous plant of the genus Clintonia having broad basal leaves and white or yellowish or purplish flowers followed by blue or black berries | Synonyms: Clinton's lily |
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| cobblestone | (noun) rectangular paving stone with curved top; once used to make roads | Synonyms: cobble, sett |
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| (verb) pave with cobblestones | Synonyms: cobble |
| copestone | (noun) a stone that forms the top of wall or building | Synonyms: capstone, coping stone, stretcher |
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| (noun) a final touch; a crowning achievement; a culmination | Synonyms: capstone, finishing touch |
| cornerstone | (noun) a stone at the outer corner of two intersecting masonry walls | - |
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| (noun) a stone in the exterior of a large and important building; usually carved with a date and laid with appropriate ceremonies | - |
| (noun) the fundamental assumptions from which something is begun or developed or calculated or explained | Synonyms: base, basis, foundation, fundament, groundwork |
| cotoneaster | (noun) any shrub of the genus Cotoneaster: erect or creeping shrubs having richly colored autumn foliage and many small white to pinkish flowers followed by tiny red or black fruits | - |
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| cotton | (noun) fabric woven from cotton fibers | - |
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| (noun) thread made of cotton fibers | - |
| (noun) erect bushy mallow plant or small tree bearing bolls containing seeds with many long hairy fibers | Synonyms: cotton plant |
| (noun) soft silky fibers from cotton plants in their raw state | Synonyms: cotton fiber, cotton wool |
| (verb) take a liking to | - |
| cottonmouth | (noun) venomous semiaquatic snake of swamps in southern United States | Synonyms: Agkistrodon piscivorus, cottonmouth moccasin, water moccasin |
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| cottonseed | (noun) seed of cotton plants; source of cottonseed oil | - |
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| cottontail | (noun) common small rabbit of North America having greyish or brownish fur and a tail with a white underside; a host for Ixodes pacificus and Ixodes scapularis (Lyme disease ticks) | Synonyms: cottontail rabbit, wood rabbit |
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| cottonweed | (noun) any of various plants of the genus Froelichia found in sandy soils and on rocky slopes in warmer regions of America; grown for their spikes of woolly white flowers | - |
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| (noun) an American everlasting having foliage with soft wooly hairs and corymbose heads with pearly white bracts | Synonyms: Anaphalis margaritacea, pearly everlasting |
| cottonwick | (noun) of warm Atlantic waters | Synonyms: Haemulon malanurum |
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| cottonwood | (noun) any of several North American trees of the genus Populus having a tuft of cottony hairs on the seed | - |
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| (noun) American basswood of the Allegheny region | Synonyms: Tilia heterophylla, white basswood |
| cottony | (adjective) resembling cotton; as soft as cotton | - |
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| craton | (noun) the part of a continent that is stable and forms the central mass of the continent; typically Precambrian | - |
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| cretonne | (noun) an unglazed heavy fabric; brightly printed; used for slipcovers and draperies | - |
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| croton | (noun) tropical Asiatic shrub; source of croton oil | Synonyms: Croton tiglium |
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| (noun) grown in many varieties for their brightly colored foliage; widely cultivated as a houseplant | Synonyms: Codiaeum variegatum |
| crotonbug | (noun) small light-brown cockroach brought to United States from Europe; a common household pest | Synonyms: Blattella germanica, Croton bug, German cockroach, water bug |
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