Focal

Focal
Focal Fo"cal, a. [Cf. F. focal. See {Focus}.] Belonging to,or concerning, a focus; as, a focal point. [1913 Webster]

{Focal distance, or length, of a lens or mirror} (Opt.), the distance of the focus from the surface of the lens or mirror, or more exactly, in the case of a lens, from its optical center.

{Focal distance of a telescope}, the distance of the image of an object from the object glass. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

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  • FOCAL-69 — was the landmark version of the FOCAL programming language, more widely publicized than the original version of the language created in 1968. FOCAL 69, created by Richard Merrill is important because: * It was the basis for all later derivatives… …   Wikipedia

  • focal — focal, ale, aux [ fɔkal, o ] adj. et n. f. • 1812; du lat. focus « foyer » 1 ♦ Phys. Qui concerne le foyer, les foyers d un instrument d optique. ⇒ bifocal. Axe focal, plan focal. N. f. Distance focale. Objectif à focale variable. ⇒ zoom. 2 ♦… …   Encyclopédie Universelle

  • Focal — may refer to:*Focal (lexicographical website), an Irish lexicographical website *FOCAL (programming language) **FOCAL 69 **Focal (HP 41) *Relating to focusee also*Focal point (disambiguation) *Focal adhesion *Focal character *Focal dystonia… …   Wikipedia

  • focal — FOCÁL, Ă, focali, e, adj. (fiz.) Privitor la focarul lentilelor sau al oglinzilor. ♢ Distanţă focală = distanţa dintre centrul unei lentile şi focarul său. – Din fr. focal. Trimis de zaraza joe, 13.09.2007. Sursa: DEX 98  focál adj. m., pl.… …   Dicționar Român

  • FOCAL (HP-41) — FOCAL ist die am meisten verbreitete Bezeichnung der Programmiersprache für die Taschenrechnerserie HP 41 von Hewlett Packard, die mit dem Modell HP 41C gestartet wurde. FOCAL ist ein Akronym aus Forty One CAlculator Language. FOCAL bietet mehr… …   Deutsch Wikipedia

  • FOCAL — steht für zwei verschiedene Programmiersprachen: FOCAL (HP 41) (für Forty One CAlculator Language) auf programmierbaren Taschenrechnern von Hewlett Packard (HP) FOCAL (für FOrmular CALculator), insbesondere FOCAL 69, ist eine Programmiersprache… …   Deutsch Wikipedia

  • focal — focal, ale (fo kal, ka l ) adj. Terme de géométrie et de physique. Qui a rapport au foyer d un miroir ou d une lentille.    Distance focale, intervalle compris entre le centre optique d une lentille et son foyer principal ou l objet qui s y… …   Dictionnaire de la Langue Française d'Émile Littré

  • focal — adjetivo 1. Área: física, geometría Del foco: distancia focal …   Diccionario Salamanca de la Lengua Española

  • focal — adj. Fís. y Geom. Perteneciente o relativo al foco. Distancia focal …   Diccionario de la lengua española

  • Focal... — Focal... (v. lat.), den Focus, s.d. 3), betreffend, z.B. Focaldistanz, die Entfernung vom Brennpunkte …   Pierer's Universal-Lexikon

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