bifocal
I. adjective Etymology: International Scientific Vocabulary Date: 1888 1. having two focal lengths 2. having one part that corrects for near vision and one for distant vision <
a bifocal eyeglass lens
>
II. noun Date: 1899 1. plural eyeglasses with bifocal lenses 2. a bifocal glass or lens

New Collegiate Dictionary. 2001.

Look at other dictionaries:

  • bifocal — BIFOCÁL, Ă, bifocali, e, adj. (Despre lentile) Cu două distanţe focale diferite; (despre ochelari) cu lentile bifocale. – Din fr. bifocal. Trimis de paula, 21.06.2002. Sursa: DEX 98  bifocál adj. m., pl. bifocáli; f. sg. bifocálă …   Dicționar Român

  • bifocal — bifocal, ale, aux [ bifɔkal, o ] adj. • v. 1930; de bi et focal ♦ Opt. Qui a deux foyers. Lunettes bifocales, dont le verre est divisé en deux parties, l une pour la vision à distance, l autre pour la vision rapprochée (cf. À double foyer). ●… …   Encyclopédie Universelle

  • Bifocal — Bi fo cal, n. [Pref. bi + focal.] a bifocal lens. [PJC] …   The Collaborative International Dictionary of English

  • bifocal — ► ADJECTIVE ▪ denoting a lens having two parts each with a different focal length, one for distant and one for near vision. ► NOUN (bifocals) ▪ a pair of glasses with bifocal lenses …   English terms dictionary

  • Bifocal — Bi fo cal, a. [Pref. bi + focal.] Having two foci, as some spectacle lenses. [Webster 1913 Suppl.] …   The Collaborative International Dictionary of English

  • bifocal — 1. relativo a o que tiene dos focos. 2. (de una lente) que tiene dos áreas de diferente distancia focal. Diccionario Mosby Medicina, Enfermería y Ciencias de la Salud, Ediciones Hancourt, S.A. 1999 …   Diccionario médico

  • bifocal — (adj.) having two foci, 1844, from BI (Cf. bi ) + focal (see FOCUS (Cf. focus)) …   Etymology dictionary

  • bifocal — adj. 2 g. Que tem dois focos …   Dicionário da Língua Portuguesa

  • bifocal — adjetivo 1. Área: óptica Que tiene dos focos: lentes bifocales …   Diccionario Salamanca de la Lengua Española

  • bifocal — adj. Ópt. Que tiene dos focos. Se dice principalmente de las lentes que tienen dos partes, para corregir la visión a corta y a larga distancia …   Diccionario de la lengua española

  • bifocal — ☆ bifocal [bī fō′kəl, bī′fō΄kəl ] adj. adjusted to two different focal lengths n. a lens, esp. for eyeglasses, with one part ground for close focus, as for reading, and the other ground for distance …   English World dictionary

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