| Pronunciation: | | 'fowkul
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| Matching Terms: | | focal distance, focal epilepsy, focal infection, focal length, focal point, focal point velocity, focal ratio, focal seizure, focal seizures, focalisation, focalise, focalization, focalize, focally
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 WordNet Dictionary |
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| | Definition: | |
- [adj] having or localized centrally at a focus; "focal point"; "focal infection"
- [adj] of or relating to a focus; "focal length"
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| | Synonyms: | | central |
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| Webster's 1913 Dictionary |
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| | Definition: | | \Fo"cal\, a. [Cf. F. focal. See {Focus}.]
Belonging to,or concerning, a focus; as, a focal point.
{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.
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| Computing Dictionary |
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| | Definition: | | 1. FOrmula CALculator. An interactive system written by Rick Merrill of dec in 1969 for pdp-5 and pdp-8. It was a descendant of aid/joss. Versions: FOCAL-69, FOCAL-1971, FOCAL-11 (for pdp-11 under rt-11). 2. Forty-One CAlculator Language. The programming language of the HP-41 calculator line. |
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| Thesaurus Terms |
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| | Related Terms: | | approaching, arch, asymptotic, banner, basic, bedrock, capital, cardinal, central, centralized, centred, centripetal, centrolineal, champion, chief, concentrated, concurrent, confluent, confocal, connivent, convergent, converging, crowning, dominant, essential, first, foremost, fundamental, great, headmost, hegemonic, indispensable, leading, life-and-death, life-or-death, magisterial, main, master, material, meeting, mutually approaching, of vital importance, overruling, paramount, predominant, preeminent, preponderant, prevailing, primal, primary, prime, principal, radial, radiating, ranking, ruling, sovereign, star, stellar, substantive, supereminent, tangent, tangential, topflight, uniting, vital |
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