Visual Vis"u*al, a. [L. visualis, from visus a seeing, sight: cf. F. visuel. See {Vision}.] 1. Of or pertaining to sight; used in sight; serving as the instrument of seeing; as, the visual nerve. [1913 Webster]

The air, Nowhere so clear, sharpened his visual ray. --Milton. [1913 Webster]

2. That can be seen; visible. [R.] [1913 Webster]

{Visual angle}. (Opt.) See under {Angle}.

{Visual cone} (Persp.), a cone whose vertex is at the point of sight, or the eye.

{Visual plane}, any plane passing through the point of sight.

{Visual point}, the point at which the visual rays unite; the position of the eye.

{Visual purple} (Physiol.), a photochemical substance, of a purplish red color, contained in the retina of human eyes and in the eyes of most animals. It is quickly bleached by light, passing through the colors, red, orange, and yellow, and then disappearing. Also called {rhodopsin}, and {vision purple}. See {Optography}.

{Visual ray}, a line from the eye, or point of sight.

{Visual white} (Physiol.), the final product in the action of light on visual purple. It is reconverted into visual purple by the regenerating action of the choroidal epithelium.

{Visual yellow} (Physiol.), a product intermediate between visual purple and visual white, formed in the photochemical action of light on visual purple. [1913 Webster]

The Collaborative International Dictionary of English. 2000.


Look at other dictionaries:

  • visual — • adj. 2 g. 2. Relativo à vista ou à visão. • s. m. 3. Tema em imagens de uma publicidade, por oposição a slogan. 4. Imagem exterior de algo ou alguém (ex.: compor o visual; vou mudar o meu visual). = ASPETO, FIGURA 5. memória visual: memória que …   Dicionário da Língua Portuguesa

  • visual — (Del lat. visuālis). 1. adj. Perteneciente o relativo a la visión. 2. f. Línea recta que se considera tirada desde el ojo del observador hasta un objeto. ☛ V. agudeza visual, campo visual, punto visual, rayo visual …   Diccionario de la lengua española

  • visual — [vizh′o͞o əl] adj. [ME < LL visualis < L visus, a sight: see VISION] 1. a) of, connected with, or used in seeing b) based on, designed for, or controlled by the use of sight [visual flight rules] 2. that is or can be seen; visible 3 …   English World dictionary

  • visual — (adj.) early 15c., coming from the eye or sight (as a beam of light), from L.L. visualis of sight, from L. visus sight, from visus, pp. of videre to see (see VISION (Cf. vision)). Meaning relating to vision is first attested c.1600. The noun… …   Etymology dictionary

  • visual — Relativo al sentido de la vista. Diccionario Mosby Medicina, Enfermería y Ciencias de la Salud, Ediciones Hancourt, S.A. 1999 …   Diccionario médico

  • visual — index discernible, perceivable, perceptible Burton s Legal Thesaurus. William C. Burton. 2006 …   Law dictionary

  • visual — [adj] able to be seen with eyes beheld, discernible, imaged, observable, observed, ocular, optic, optical, perceptible, seeable, seen, viewable, viewed, visible, visional; concepts 485,576,619 …   New thesaurus

  • visual — ► ADJECTIVE ▪ relating to seeing or sight. ► NOUN ▪ a picture, piece of film, or display used to illustrate or accompany something. DERIVATIVES visually adverb. ORIGIN Latin visualis, from videre to see …   English terms dictionary

  • visual — /vizh ooh euhl/, adj. 1. of or pertaining to seeing or sight: a visual image. 2. used in seeing: the visual sense. 3. optical. 4. perceptible by the sense of sight; visible: a visual beauty. 5. perceptible by the mind; of the nature of a mental… …   Universalium

  • visual — ► adjetivo 1 De la vista o de la visión: ■ con la edad le ha disminuido la capacidad visual. ► sustantivo femenino 2 FÍSICA Línea recta imaginaria que va desde el ojo del observador al objeto observado. * * * visual (del lat. «visuālis») 1 adj.… …   Enciclopedia Universal

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