| acanthopterygian | (noun) a teleost fish with fins that are supported by sharp inflexible rays | Synonyms: spiny-finned fish |
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| adopt | (verb) take into one's family | Synonyms: take in |
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| (verb) take on a certain form, attribute, or aspect | Synonyms: acquire, assume, take, take on |
| (verb) take up the cause, ideology, practice, method, of someone and use it as one's own | Synonyms: embrace, espouse, sweep up |
| (verb) put into dramatic form | Synonyms: dramatise, dramatize |
| (verb) take up and practice as one's own | Synonyms: borrow, take over, take up |
| (verb) choose and follow; as of theories, ideas, policies, strategies or plans | Synonyms: espouse, follow |
| (verb) take on titles, offices, duties, responsibilities | Synonyms: assume, take on, take over |
| adoptable | (adjective) suitable or eligible for adoption | - |
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| adopted | (adjective) acquired as your own by free choice | Synonyms: adoptive |
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| adoptee | (noun) someone (such as a child) who has been adopted | - |
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| adopter | (noun) a person who adopts a child of other parents as his or her own child | Synonyms: adoptive parent |
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| adoption | (noun) the act of accepting with approval; favorable reception | Synonyms: acceptance, acceptation, espousal |
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| (noun) the appropriation (of ideas or words etc) from another source | Synonyms: borrowing |
| (noun) a legal proceeding that creates a parent-child relation between persons not related by blood; the adopted child is entitled to all privileges belonging to a natural child of the adoptive parents (including the right to inherit) | - |
| adoptive | (adjective) of parents and children; related by adoption | - |
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| (adjective) acquired as your own by free choice | Synonyms: adopted |
| amethopterin | (noun) toxic antimetabolite that limits cellular reproduction by acting as an antagonist to folic acid; used to treat certain cancers and psoriasis and rheumatoid arthritis | Synonyms: methotrexate, methotrexate sodium |
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| angiopteris | (noun) highly variable species of very large primitive ferns of the Pacific tropical areas with high rainfall | Synonyms: Angiopteris evecta, giant fern |
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| anomalopteryx | (noun) the smallest moa; slender moa about the size of a large turkey | Synonyms: Anomalopteryx oweni |
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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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| archaeopteryx | (noun) extinct primitive toothed bird of the Jurassic period having a long feathered tail and hollow bones; usually considered the most primitive of all birds | Synonyms: Archaeopteryx lithographica, archeopteryx |
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| archeopteryx | (noun) extinct primitive toothed bird of the Jurassic period having a long feathered tail and hollow bones; usually considered the most primitive of all birds | Synonyms: archaeopteryx, Archaeopteryx lithographica |
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| catoptric | (adjective) of or relating to catoptrics; produced by or based on mirrors | Synonyms: catoptrical |
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| catoptrical | (adjective) of or relating to catoptrics; produced by or based on mirrors | Synonyms: catoptric |
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| catoptrics | (noun) branch of optics dealing with formation of images by mirrors | - |
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| chiropteran | (noun) nocturnal mouselike mammal with forelimbs modified to form membranous wings and anatomical adaptations for echolocation by which they navigate | Synonyms: bat |
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| crossopterygian | (noun) any fish of the order Crossopterygii; most known only in fossil form | Synonyms: lobe-finned fish, lobefin |
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| dictyopteran | (adjective) of or relating to or belonging to the order Dictyoptera | - |
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| diopter | (noun) a unit of measurement of the refractive power of a lens which is equal to the reciprocal of the focal length measured in meters; used by oculists | Synonyms: dioptre |
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| dioptre | (noun) a unit of measurement of the refractive power of a lens which is equal to the reciprocal of the focal length measured in meters; used by oculists | Synonyms: diopter |
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| enteroptosis | (noun) an abnormally downward position of the intestines in the abdominal cavity | - |
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| ephemeropteran | (noun) short-lived insect | Synonyms: ephemerid |
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| fiberoptic | (adjective) of or relating to fiber optics | Synonyms: fiber-optic, fibre-optic, fibreoptic |
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| fiberoptics | (noun) the transmission of light signals via glass fibers | Synonyms: fiber optics, fibre optics, fibreoptics |
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| fibreoptic | (adjective) of or relating to fiber optics | Synonyms: fiber-optic, fiberoptic, fibre-optic |
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| fibreoptics | (noun) the transmission of light signals via glass fibers | Synonyms: fiber optics, fiberoptics, fibre optics |
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| glossoptosis | (noun) abnormal downward or back placement of the tongue | - |
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| haemoptysis | (noun) coughing up blood from the respiratory tract; usually indicates a severe infection of the bronchi or lungs | Synonyms: hemoptysis |
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| helicopter | (noun) an aircraft without wings that obtains its lift from the rotation of overhead blades | Synonyms: chopper, eggbeater, whirlybird |
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| hemoptysis | (noun) coughing up blood from the respiratory tract; usually indicates a severe infection of the bronchi or lungs | Synonyms: haemoptysis |
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| homopteran | (noun) insects having membranous forewings and hind wings | Synonyms: homopterous insect |
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| hymenopter | (noun) insects having two pairs of membranous wings and an ovipositor specialized for stinging or piercing | Synonyms: hymenopteran, hymenopteron, hymenopterous insect |
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| hymenopteran | (noun) insects having two pairs of membranous wings and an ovipositor specialized for stinging or piercing | Synonyms: hymenopter, hymenopteron, hymenopterous insect |
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| hymenopteron | (noun) insects having two pairs of membranous wings and an ovipositor specialized for stinging or piercing | Synonyms: hymenopter, hymenopteran, hymenopterous insect |
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| hymenopterous | (adjective) of or relating to insects of the order Hymenoptera | - |
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| isopteran | (adjective) relating to or characteristic of insects of the order Isoptera | - |
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| lecanopteris | (noun) any of several bizarre ferns of the genus Lecanopteris having swollen hollow rhizomes that provide homes for symbiotic ants | - |
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| lepidopteran | (noun) insect that in the adult state has four wings more or less covered with tiny scales | Synonyms: lepidopteron, lepidopterous insect |
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| lepidopterist | (noun) an entomologist who specializes in the collection and study of butterflies and moths | Synonyms: butterfly collector, lepidopterologist |
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| lepidopterologist | (noun) an entomologist who specializes in the collection and study of butterflies and moths | Synonyms: butterfly collector, lepidopterist |
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| lepidopterology | (noun) the branch of entomology dealing with Lepidoptera | Synonyms: lepidoptery |
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| lepidopteron | (noun) insect that in the adult state has four wings more or less covered with tiny scales | Synonyms: lepidopteran, lepidopterous insect |
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| lepidoptery | (noun) the branch of entomology dealing with Lepidoptera | Synonyms: lepidopterology |
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| malacopterygian | (noun) any fish of the superorder Malacopterygii | Synonyms: soft-finned fish |
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| mecopteran | (noun) any of various carnivorous insects of the order Mecoptera | - |
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| mecopterous | (adjective) of or relating to mecopterans | - |
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| metroptosis | (noun) prolapse of the uterus | Synonyms: descensus uteri |
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| monopteral | (adjective) having circular columniation | - |
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| nephroptosia | (noun) prolapse of the kidney | Synonyms: nephroptosis |
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| nephroptosis | (noun) prolapse of the kidney | Synonyms: nephroptosia |
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| neuropteran | (noun) insect having biting mouthparts and four large membranous wings with netlike veins | Synonyms: neuropteron, neuropterous insect |
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| neuropteron | (noun) insect having biting mouthparts and four large membranous wings with netlike veins | Synonyms: neuropteran, neuropterous insect |
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| nonoptimality | (noun) The state of not being best, most favourable or desirable. | - |
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| opt | (verb) select as an alternative over another | Synonyms: choose, prefer |
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| optative | (adjective) relating to a mood of verbs in some languages | - |
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| (adjective) indicating an option or wish | - |
| (noun) a mood (as in Greek or Sanskrit) that expresses a wish or hope; expressed in English by modal verbs | Synonyms: optative mood |
| optic | (adjective) of or relating to or resembling the eye | Synonyms: ocular, ophthalmic, optical |
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| (adjective) relating to or using sight | Synonyms: ocular, optical, visual |
| (noun) the organ of sight | Synonyms: eye, oculus |
| optical | (adjective) of or relating to or resembling the eye | Synonyms: ocular, ophthalmic, optic |
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| (adjective) of or relating to or involving light or optics | - |
| (adjective) relating to or using sight | Synonyms: ocular, optic, visual |
| optically | (adverb) in an optical manner | - |
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| optician | (noun) a worker who makes glasses for remedying defects of vision | Synonyms: lens maker |
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| optics | (noun) optical properties | - |
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| (noun) the branch of physics that studies the physical properties of light | - |
| optimal | (adjective) most desirable possible under a restriction expressed or implied | Synonyms: optimum |
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| optimally | (adverb) in an optimal and most desirable way | - |
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| optimisation | (noun) the act of rendering optimal | Synonyms: optimization |
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| optimise | (verb) act as an optimist and take a sunny view of the world | Synonyms: optimize |
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| (verb) make optimal; get the most out of; use best | Synonyms: optimize |
| (verb) modify to achieve maximum efficiency in storage capacity or time or cost | Synonyms: optimize |
| optimism | (noun) a general disposition to expect the best in all things | - |
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| (noun) the optimistic feeling that all is going to turn out well | - |
| optimist | (noun) a person disposed to take a favorable view of things | - |
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| optimistic | (adjective) expecting the best in this best of all possible worlds | - |
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| (adjective) expecting the best | Synonyms: affirmative |
| optimistically | (adverb) with optimism; in an optimistic manner | - |
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| optimization | (noun) the act of rendering optimal | Synonyms: optimisation |
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| optimize | (verb) act as an optimist and take a sunny view of the world | Synonyms: optimise |
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| (verb) make optimal; get the most out of; use best | Synonyms: optimise |
| (verb) modify to achieve maximum efficiency in storage capacity or time or cost | Synonyms: optimise |
| optimum | (adjective) most desirable possible under a restriction expressed or implied | Synonyms: optimal |
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| (noun) most favorable conditions or greatest degree or amount possible under given circumstances | - |
| option | (noun) the act of choosing or selecting | Synonyms: choice, pick, selection |
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| (noun) one of a number of things from which only one can be chosen | Synonyms: alternative, choice |
| (noun) the right to buy or sell property at an agreed price; the right is purchased and if it is not exercised by a stated date the money is forfeited | - |
| optional | (adjective) possible but not necessary; left to personal choice | - |
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| optionality | (noun) Quality or state in which choice or discretion is allowed. | Synonyms: electiveness |
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| optionally | (adverb) in an optional manner | - |
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| optometrist | (noun) a person skilled in testing for defects of vision in order to prescribe corrective glasses | Synonyms: oculist |
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| optometry | (noun) the practice of an optometrist | - |
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| ornithopter | (noun) heavier-than-air craft that is propelled by the flapping of wings | Synonyms: orthopter |
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| orthopter | (noun) heavier-than-air craft that is propelled by the flapping of wings | Synonyms: ornithopter |
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| orthopteran | (noun) any of various insects having leathery forewings and membranous hind wings and chewing mouthparts | Synonyms: orthopteron, orthopterous insect |
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| orthopteron | (noun) any of various insects having leathery forewings and membranous hind wings and chewing mouthparts | Synonyms: orthopteran, orthopterous insect |
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| orthoptic | (adjective) of or relating to normal binocular vision | - |
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| orthoptics | (noun) treatment of defects of binocular vision (such as strabismus and amblyopia) by nonsurgical measures (especially by exercises to strengthen the eye muscles) | - |
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| orthoptist | (noun) a specialist in orthoptics | - |
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| panoptic | (adjective) broad in scope or content | Synonyms: across-the-board, all-embracing, all-encompassing, all-inclusive, blanket, broad, encompassing, extensive, wide |
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| (adjective) including everything visible in one view | Synonyms: panoptical |
| panoptical | (adjective) including everything visible in one view | Synonyms: panoptic |
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| panopticon | (noun) a circular prison with cells distributed around a central surveillance station; proposed by Jeremy Bentham in 1791 | - |
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| (noun) an area where everything is visible | - |
| pecopteris | (noun) Carboniferous fossil fern characterized by a regular arrangement of the leaflets resembling a comb | - |
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| plecopteran | (noun) primitive winged insect with a flattened body; used as bait by fishermen; aquatic gilled larvae are carnivorous and live beneath stones | Synonyms: stone fly, stonefly |
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| sarcoptid | (noun) whitish mites that attack the skin of humans and other animals | Synonyms: itch mite |
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| stenopterygius | (noun) an ichthyosaur of the genus Stenopterygius | Synonyms: Stenopterygius quadrisicissus |
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| synoptic | (adjective) presenting a summary or general view of a whole | - |
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| (adjective) presenting or taking the same point of view; used especially with regard to the first three gospels of the New Testament | Synonyms: synoptical |
| synoptical | (adjective) presenting or taking the same point of view; used especially with regard to the first three gospels of the New Testament | Synonyms: synoptic |
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| thyrsopteris | (noun) a terrestrial tree fern of South America | Synonyms: Thyrsopteris elegans |
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| thysanopter | (noun) an insect of the order Thysanoptera | Synonyms: thysanopteron, thysanopterous insect |
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| thysanopteron | (noun) an insect of the order Thysanoptera | Synonyms: thysanopter, thysanopterous insect |
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| trichopteran | (noun) caddis fly | Synonyms: trichopteron, trichopterous insect |
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| trichopteron | (noun) caddis fly | Synonyms: trichopteran, trichopterous insect |
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