| allochthonous | (adjective) of rocks, deposits, etc.; found in a place other than where they and their constituents were formed | - |
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| apophthegm | (noun) a short pithy instructive saying | Synonyms: aphorism, apothegm |
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| arishth | (noun) large semi-evergreen tree of the East Indies; trunk exudes a tenacious gum; bitter bark used as a tonic; seeds yield an aromatic oil; sometimes placed in genus Melia | Synonyms: Azadirachta indica, margosa, Melia Azadirachta, neem, neem tree, nim tree |
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| autochthon | (noun) the earliest known inhabitants of a region | - |
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| autochthonal | (adjective) originating where it is found | Synonyms: autochthonic, autochthonous, endemic, indigenous |
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| autochthonic | (adjective) originating where it is found | Synonyms: autochthonal, autochthonous, endemic, indigenous |
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| autochthonous | (adjective) of rocks, deposits, etc.; found where they and their constituents were formed | - |
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| (adjective) originating where it is found | Synonyms: autochthonal, autochthonic, endemic, indigenous |
| autochthony | (noun) nativeness by virtue of originating or occurring naturally (as in a particular place) | Synonyms: endemism, indigenousness |
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| axerophthol | (noun) any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes | Synonyms: A, antiophthalmic factor, vitamin A |
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| chondrichthian | (noun) fishes in which the skeleton may be calcified but not ossified | Synonyms: cartilaginous fish |
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| chthonian | (adjective) dwelling beneath the surface of the earth | Synonyms: chthonic, nether |
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| chthonic | (adjective) dwelling beneath the surface of the earth | Synonyms: chthonian, nether |
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| diphtheria | (noun) acute contagious infection caused by the bacterium Corynebacterium diphtheriae; marked by the formation of a false membrane in the throat and other air passages causing difficulty in breathing | - |
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| diphthong | (noun) a vowel sound that starts near the articulatory position for one vowel and moves toward the position for another | - |
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| diphthongise | (verb) change from a simple vowel to a diphthong | Synonyms: diphthongize |
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| diphthongize | (verb) change from a simple vowel to a diphthong | Synonyms: diphthongise |
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| eighth | (adjective) coming next after the seventh and just before the ninth in position | Synonyms: 8th |
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| (noun) one part in eight equal parts | Synonyms: one-eighth |
| (noun) position eight in a countable series of things | - |
| exophthalmos | (noun) protrusion of the eyeball from the socket | - |
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| ichthyolatry | (noun) the worship of fish | Synonyms: fish-worship |
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| ichthyologist | (noun) a zoologist who studies fishes | - |
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| ichthyology | (noun) the branch of zoology that studies fishes | - |
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| ichthyosaur | (noun) any of several marine reptiles of the Mesozoic having a body like a porpoise with dorsal and tail fins and paddle-shaped limbs | - |
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| ichthyosaurus | (noun) ichthyosaurs of the Jurassic | - |
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| ichthyosis | (noun) any of several congenital diseases in which the skin is dry and scaly like a fish | - |
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| ichthyostega | (noun) early tetrapod amphibian found in Greenland | - |
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| knighthood | (noun) aristocrats holding the rank of knight | - |
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| lagophthalmos | (noun) abnormal condition in which an eye cannot close completely | - |
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| lightheaded | (adjective) lacking seriousness; given to frivolity | Synonyms: airheaded, dizzy, empty-headed, featherbrained, giddy, light-headed, silly |
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| (adjective) weak and likely to lose consciousness | Synonyms: faint, light-headed, light, swooning |
| lightheadedness | (noun) a frivolous lack of prudence | - |
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| (noun) a reeling sensation; a feeling that you are about to fall | Synonyms: dizziness, giddiness, vertigo |
| lighthearted | (adjective) carefree and happy and lighthearted | Synonyms: blithe, blithesome, light-hearted, lightsome |
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| lightheartedness | (noun) the cheerful feeling you have when nothing is troubling you | Synonyms: carefreeness, insouciance, lightsomeness |
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| lighthouse | (noun) a tower with a light that gives warning of shoals to passing ships | Synonyms: beacon, beacon light, pharos |
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| nanophthalmos | (noun) condition in which both eyes are abnormally small but otherwise normal | - |
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| naphtha | (noun) any of various volatile flammable liquid hydrocarbon mixtures; used chiefly as solvents | - |
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| naphthalene | (noun) a white crystalline strong-smelling hydrocarbon made from coal tar or petroleum and used in organic synthesis and as a fumigant in mothballs | - |
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| naphthol | (noun) either of two phenols derived from naphthalene | - |
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| naphthoquinone | (noun) a fat-soluble vitamin that helps in the clotting of blood | Synonyms: antihemorrhagic factor, vitamin K |
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| nephthytis | (noun) any plant of the genus Nephthytis | - |
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| nighthawk | (noun) mainly nocturnal North American goatsucker | Synonyms: bullbat, mosquito hawk |
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| (noun) a person who likes to be active late at night | Synonyms: night owl, nightbird |
| ophthalmectomy | (noun) surgical removal of an eye | - |
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| ophthalmia | (noun) severe conjunctivitis | Synonyms: ophthalmitis |
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| ophthalmic | (adjective) of or relating to ophthalmology | - |
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| (adjective) of or relating to or resembling the eye | Synonyms: ocular, optic, optical |
| ophthalmitis | (noun) severe conjunctivitis | Synonyms: ophthalmia |
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| ophthalmologist | (noun) a medical doctor specializing in the diagnosis and treatment of diseases of the eye | Synonyms: eye doctor, oculist |
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| ophthalmology | (noun) the branch of medicine concerned with the eye and its diseases | - |
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| ophthalmoplegia | (noun) paralysis of the motor nerves of the eye | - |
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| ophthalmoscope | (noun) medical instrument for examining the retina of the eye | - |
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| ophthalmoscopy | (noun) examination of the interior of an eye using an ophthalmoscope | - |
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| phenolphthalein | (noun) a laxative used in many preparations under various trade names; also used as an acid-base indicator in titrations involving weak acids and strong bases because it is brilliant red at high alkalinity and colorless below pH 8 | - |
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| phthisis | (noun) involving the lungs with progressive wasting of the body | Synonyms: consumption, pulmonary tuberculosis, wasting disease, white plague |
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| resorcinolphthalein | (noun) a yellow dye that is visible even when highly diluted; used as an absorption indicator when silver nitrate solution is added to sodium chloride in order to precipitate silver chloride (turns pink when no chloride ions are left in solution and negative fluorescein ions are then absorbed) | Synonyms: fluorescein, fluoresceine, fluorescent dye |
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| righthander | (noun) a person who uses the right hand more skillfully than the left | Synonyms: right-hander, right hander |
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| xerophthalmia | (noun) abnormal dryness of the conjunctiva and cornea of the eyes; may be due to a systemic deficiency of vitamin A | Synonyms: conjunctivitis arida, xeroma, xerophthalmus |
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| xerophthalmus | (noun) abnormal dryness of the conjunctiva and cornea of the eyes; may be due to a systemic deficiency of vitamin A | Synonyms: conjunctivitis arida, xeroma, xerophthalmia |
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