Definition of vision

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Vision (v.) The faculty of seeing; sight; one of the five senses, by which colors and the physical qualities of external objects are appreciated as a result of the stimulating action of light on the sensitive retina, an expansion of the optic nerve..

Lern More About Vision

Niagara Period :: Niagara period () A subdivision or the American Upper Silurian system, embracing the Medina, Clinton, and Niagara epoch. The rocks of the Niagara epoch, mostly limestones, are extensively distributed, and at Niagara Falls consist of about eighty feet of shale supporting a greater thickness of limestone, which is gradually undermined by the removal of the shale. See Chart of Geology..
Scotomy :: Scotomy (n.) Obscuration of the field of vision due to the appearance of a dark spot before the eye.
Saltatoria :: Saltatoria (n. pl.) A division of Orthoptera including grasshoppers, locusts, and crickets..
Photics :: Photics (n.) The science of light; -- a general term sometimes employed when optics is restricted to light as a producing vision.
Divider :: Divider (n.) One who, or that which, causes division..
Trithing :: Trithing (n.) One of three ancient divisions of a county in England; -- now called riding.
Spermosphere :: Spermosphere (n.) A mass or ball of cells formed by the repeated division of a male germinal cell (spermospore), each constituent cell (spermoblast) of which is converted into a spermatozoid; a spermatogemma..
Pensionary :: Pensionary (a.) Consisting of a pension; as, a pensionary provision for maintenance..
Presbyopia :: Presbyopia () A defect of vision consequent upon advancing age. It is due to rigidity of the crystalline lens, which produces difficulty of accommodation and recession of the near point of vision, so that objects very near the eyes can not be seen distinctly without the use of convex glasses. Called also presbytia..
Rhapsody :: Rhapsody (n.) A recitation or song of a rhapsodist; a portion of an epic poem adapted for recitation, or usually recited, at one time; hence, a division of the Iliad or the Odyssey; -- called also a book..
Protophyte :: Protophyte (n.) Any unicellular plant, or plant forming only a plasmodium, having reproduction only by fission, gemmation, or cell division..
Ward :: Ward (n.) A division, district, or quarter of a town or city..
Vermes :: Vermes (n. pl.) An extensive artificial division of the animal kingdom, including the parasitic worms, or helminths, together with the nemerteans, annelids, and allied groups. By some writers the branchiopods, the bryzoans, and the tunicates are also included. The name was used in a still wider sense by Linnaeus and his followers..
Perimeter :: Perimeter (n.) An instrument for determining the extent and shape of the field of vision.
Micrococcus :: Micrococcus (n.) A genus of Spherobacteria, in the form of very small globular or oval cells, forming, by transverse division, filaments, or chains of cells, or in some cases single organisms shaped like dumb-bells (Diplococcus), all without the power of motion. See Illust. of Ascoccus..
Anthropography :: Anthropography (n.) That branch of anthropology which treats of the actual distribution of the human race in its different divisions, as distinguished by physical character, language, institutions, and customs, in contradistinction to ethnography, which treats historically of the origin and filiation of races and nations..
Insufficiency :: Insufficiency (n.) The quality or state of being insufficient; want of sufficiency; deficiency; inadequateness; as, the insufficiency of provisions, of an excuse, etc..
Shifter :: Shifter (n.) An assistant to the ship's cook in washing, steeping, and shifting the salt provisions..
Serrifera :: Serrifera (n. pl.) A division of Hymenoptera comprising the sawflies.
Dichotomize :: Dichotomize (v. t.) To cut into two parts; to part into two divisions; to divide into pairs; to bisect.
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