| apoapsis | (noun) (astronomy) the point in an orbit farthest from the body being orbited | Synonyms: point of apoapsis |
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| apocalypse | (noun) a cosmic cataclysm in which God destroys the ruling powers of evil | - |
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| apocope | (noun) abbreviation of a word by omitting the final sound or sounds | - |
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| apocryphalness | (noun) The property of being of doubtful authenticity, of lacking authority, or of not being regarded as canonical. | - |
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| (noun) The property of being of dubious veracity; of questionable accuracy or truthfulness. | - |
| apodeme | (noun) ridge-like ingrowth of the exoskeleton of an arthropod that supports internal organs and provides attachment points for muscles | - |
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| apoenzyme | (noun) a protein that combines with a coenzyme to form an active enzyme | - |
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| apogamy | (noun) (botany) development of an embryo without fertilization; especially the development in some ferns of a sporophyte from the gametophyte without fertilization | - |
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| apogee | (noun) apoapsis in Earth orbit; the point in its orbit where a satellite is at the greatest distance from the Earth | - |
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| (noun) a final climactic stage | Synonyms: culmination |
| apojove | (noun) apoapsis in orbit around Jupiter | - |
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| apolemia | (noun) large siphonophore of up to 50 ft long | - |
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| apoliticism | (noun) Apathy and/or antipathy towards all political affiliations. | - |
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| apologetics | (noun) the branch of theology that is concerned with the defense of Christian doctrines | - |
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| apologia | (noun) a formal written defense of something you believe in strongly | Synonyms: apology |
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| apologist | (noun) a person who argues to defend or justify some policy or institution | Synonyms: justifier, vindicator |
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| apologue | (noun) a short moral story (often with animal characters) | Synonyms: allegory, fable, parable |
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| apology | (noun) a poor example | Synonyms: excuse |
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| (noun) an expression of regret at having caused trouble for someone | - |
| (noun) a formal written defense of something you believe in strongly | Synonyms: apologia |
| apolune | (noun) apoapsis in orbit around the moon | Synonyms: aposelene |
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| apomict | (noun) a plant that reproduces or is reproduced by apomixis | - |
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| apomixis | (noun) any of several kinds of reproduction without fertilization | - |
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| apomorphine | (noun) a morphine derivative that is not as strong as morphine; used as an emetic and in small doses as a sedative | - |
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| aponeurosis | (noun) any of the deeper and thicker fascia that attach muscles to bones; resemble flattened tendons | - |
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| apophasis | (noun) mentioning something by saying it will not be mentioned | - |
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| apophatism | (noun) the religious belief that God cannot be known but is completely `other' and must be described in negative terms (in terms of what God is not) | - |
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| apophthegm | (noun) a short pithy instructive saying | Synonyms: aphorism, apothegm |
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| apophysis | (noun) (anatomy) a natural outgrowth or projection on an organ or body part such as the process of a vertebra | - |
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| (noun) (botany) a natural swelling or enlargement: at the base of the stalk or seta in certain mosses or on the cone scale of certain conifers | - |
| apoplexy | (noun) a sudden loss of consciousness resulting when the rupture or occlusion of a blood vessel leads to oxygen lack in the brain | Synonyms: cerebrovascular accident, CVA, stroke |
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| apoptosis | (noun) a type of cell death in which the cell uses specialized cellular machinery to kill itself; a cell suicide mechanism that enables metazoans to control cell number and eliminate cells that threaten the animal's survival | Synonyms: caspase-mediated cell death, programmed cell death |
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| aposelene | (noun) apoapsis in orbit around the moon | Synonyms: apolune |
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| aposiopesis | (noun) breaking off in the middle of a sentence (as by writers of realistic conversations) | - |
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| apostasy | (noun) the act of abandoning a party for cause | Synonyms: tergiversation |
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| (noun) the state of having rejected your religious beliefs for your political party or a cause (often in favor of opposing beliefs or causes) | Synonyms: defection, renunciation |
| apostate | (noun) a disloyal person who betrays or deserts his cause or religion or political party or friend etc. | Synonyms: deserter, ratter, recreant, renegade, turncoat |
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| apostle | (noun) an ardent early supporter of a cause or reform | - |
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| apostleship | (noun) the position of apostle | - |
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| apostrophe | (noun) address to an absent or imaginary person | - |
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| (noun) the mark (') used to indicate the omission of one or more letters from a printed word | - |
| apothecary | (noun) a health professional trained in the art of preparing and dispensing drugs | Synonyms: chemist, druggist, pharmacist, pill pusher, pill roller |
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| apothecium | (noun) a cuplike ascocarp in many lichens and ascomycetous fungi | - |
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| apothegm | (noun) a short pithy instructive saying | Synonyms: aphorism, apophthegm |
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| apotheosis | (noun) the elevation of a person (as to the status of a god) | Synonyms: deification, exaltation |
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| (noun) model of excellence or perfection of a kind; one having no equal | Synonyms: ideal, nonesuch, nonpareil, nonsuch, paragon, saint |
| bioweapon | (noun) any weapon usable in biological warfare | Synonyms: bioarm, biological weapon |
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| capo | (noun) the head of a branch of an organized crime syndicate | - |
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| capon | (noun) castrated male chicken | - |
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| (noun) flesh of a castrated male chicken | - |
| capote | (noun) a long cloak with a hood that can be pulled over the head | Synonyms: hooded cloak |
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| (noun) a long overcoat with a hood that can be pulled over the head | Synonyms: hooded coat |
| decapod | (noun) crustaceans characteristically having five pairs of locomotor appendages each joined to a segment of the thorax | Synonyms: decapod crustacean |
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| (noun) cephalopods having eight short tentacles plus two long ones | - |
| escapologist | (noun) an entertainer who is expert in the art of escaping | Synonyms: escape expert |
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| escapology | (noun) the study of methods of escaping (especially as a form of entertainment) | - |
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| evaporation | (noun) the process of becoming a vapor | Synonyms: vapor, vaporisation, vaporization, vapour |
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| (noun) the process of extracting moisture | Synonyms: dehydration, desiccation, drying up |
| evaporite | (noun) the sediment that is left after the evaporation of seawater | - |
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| evaporometer | (noun) an instrument that measures rate of evaporation of water | Synonyms: atmometer |
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| extrapolation | (noun) (mathematics) calculation of the value of a function outside the range of known values | - |
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| (noun) an inference about the future (or about some hypothetical situation) based on known facts and observations | - |
| hexapod | (noun) an animal having six feet | - |
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| japonica | (noun) deciduous thorny shrub native to Japan having red blossoms | Synonyms: Chaenomeles japonica, maule's quince |
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| (noun) greenhouse shrub with glossy green leaves and showy fragrant rose-like flowers; cultivated in many varieties | Synonyms: Camellia japonica |
| japorn | (noun) Japanese pornography | - |
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| juxtaposition | (noun) the act of positioning close together (or side by side) | Synonyms: apposition, collocation |
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| (noun) a side-by-side position | - |
| kapok | (noun) massive tropical tree with deep ridges on its massive trunk and bearing large pods of seeds covered with silky floss; source of the silky kapok fiber | Synonyms: Bombay ceiba, Ceiba pentandra, ceiba tree, God tree, silk-cotton tree, white silk-cotton tree |
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| (noun) a plant fiber from the kapok tree; used for stuffing and insulation | Synonyms: silk cotton, vegetable silk |
| megapode | (noun) large-footed short-winged birds of Australasia; build mounds of decaying vegetation to incubate eggs | Synonyms: mound-bird, mound bird, mound builder, scrub fowl |
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| myriapod | (noun) general term for any terrestrial arthropod having an elongated body composed of many similar segments: e.g. centipedes and millipedes | - |
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| napoleon | (noun) a rectangular piece of pastry with thin flaky layers and filled with custard cream | - |
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| napoleoniana | (noun) items related to the life of Napoleon (engravings, paintings, books, etc.). | - |
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| papoose | (noun) an American Indian infant | Synonyms: pappoose |
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| papooseroot | (noun) tall herb of eastern North America and Asia having blue berrylike fruit and a thick knotty rootstock formerly used medicinally | Synonyms: blue cohosh, blueberry root, Caulophyllum thalictrioides, Caulophyllum thalictroides, papoose root, squaw root, squawroot |
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| papovavirus | (noun) any of a group of animal viruses associated with or causing papillomas or polyomas | - |
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| parapodium | (noun) one of a pair of fleshy appendages of a polychete annelid that functions in locomotion and breathing | - |
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| pervaporation | (noun) the concentration of a colloidal solution whose colloid will not pass through a semipermeable membrane; solution is placed in a bag of the membrane and the solvent is evaporated off | - |
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| sapodilla | (noun) tropical fruit with a rough brownish skin and very sweet brownish pulp | Synonyms: sapodilla plum, sapota |
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| (noun) large tropical American evergreen yielding chicle gum and edible fruit; sometimes placed in genus Achras | Synonyms: Achras zapota, Manilkara zapota, sapodilla tree |
| saponification | (noun) a chemical reaction in which an ester is heated with an alkali (especially the alkaline hydrolysis of a fat or oil to make soap) | - |
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| saponin | (noun) any of various plant glucosides that form soapy lathers when mixed and agitated with water; used in detergents and foaming agents and emulsifiers | - |
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| sapota | (noun) tropical fruit with a rough brownish skin and very sweet brownish pulp | Synonyms: sapodilla, sapodilla plum |
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| sapote | (noun) brown oval fruit flesh makes excellent sherbet | Synonyms: mammee, marmalade plum |
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| (noun) tropical American tree having wood like mahogany and sweet edible egg-shaped fruit; in some classifications placed in the genus Calocarpum | Synonyms: Calocarpum zapota, mammee, marmalade tree, Pouteria zapota |
| seaport | (noun) a sheltered port where ships can take on or discharge cargo | Synonyms: harbor, harbour, haven |
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| talapoin | (noun) smallest guenon monkey; of swampy central and west African forests | Synonyms: Cercopithecus talapoin |
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| tapotement | (noun) massage in which the body is tapped rhythmically with the fingers or with short rapid movements of the sides of the hand; used to loosen mucus on the chest walls of patients with bronchitis | - |
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| teapot | (noun) pot for brewing tea; usually has a spout and handle | - |
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| tetrapod | (noun) a vertebrate animal having four feet or legs or leglike appendages | - |
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| vapor | (noun) the process of becoming a vapor | Synonyms: evaporation, vaporisation, vaporization, vapour |
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| (noun) a visible suspension in the air of particles of some substance | Synonyms: vapour |
| vaporing | (noun) an instance of boastful talk | Synonyms: brag, bragging, crow, crowing, gasconade, line-shooting |
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| vaporisation | (noun) annihilation by vaporizing something | Synonyms: vaporization |
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| (noun) the process of becoming a vapor | Synonyms: evaporation, vapor, vaporization, vapour |
| vaporiser | (noun) a device that puts out a substance in the form of a vapor (especially for medicinal inhalation) | Synonyms: vaporizer |
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| vaporization | (noun) annihilation by vaporizing something | Synonyms: vaporisation |
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| (noun) the process of becoming a vapor | Synonyms: evaporation, vapor, vaporisation, vapour |
| vaporizer | (noun) a device that puts out a substance in the form of a vapor (especially for medicinal inhalation) | Synonyms: vaporiser |
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| vaporousness | (noun) cloudiness resulting from haze or mist or vapor | Synonyms: haziness, mistiness, steaminess, vapourousness |
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| vapors | (noun) a state of depression | Synonyms: blue devils, blues, megrims, vapours |
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| vapour | (noun) the process of becoming a vapor | Synonyms: evaporation, vapor, vaporisation, vaporization |
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| (noun) a visible suspension in the air of particles of some substance | Synonyms: vapor |
| vapourousness | (noun) cloudiness resulting from haze or mist or vapor | Synonyms: haziness, mistiness, steaminess, vaporousness |
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| vapours | (noun) a state of depression | Synonyms: blue devils, blues, megrims, vapors |
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| weapon | (noun) any instrument or instrumentality used in fighting or hunting | Synonyms: arm, weapon system |
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| (noun) a means of persuading or arguing | Synonyms: artillery |
| weaponry | (noun) weapons considered collectively | Synonyms: arms, implements of war, munition, weapons system |
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