principal focus
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Principal focus — Focus Fo cus (f[=o] k[u^]s), n.; pl. E. {Focuses} (f[=o] k[u^]s*[e^]z), L. {Foci} (f[=o] s[imac]). [L. focus hearth, fireplace; perh. akin to E. bake. Cf. {Curfew}, {Fuel}, {Fusil} the firearm.] 1. (Opt.) A point in which the rays of light meet,… … The Collaborative International Dictionary of English
principal focus — noun : the focus for a beam of incident rays parallel to the axis * * * Optics. See focal point (def. 1). [1825 35] * * * principal focus (optics) The focus for rays parallel to the axis • • • Main Entry: ↑focus … Useful english dictionary
principal focus — /prɪnsəpəl ˈfoʊkəs/ (say prinsuhpuhl fohkuhs) noun → focal point (def. 1) …
Focus — Fo cus (f[=o] k[u^]s), n.; pl. E. {Focuses} (f[=o] k[u^]s*[e^]z), L. {Foci} (f[=o] s[imac]). [L. focus hearth, fireplace; perh. akin to E. bake. Cf. {Curfew}, {Fuel}, {Fusil} the firearm.] 1. (Opt.) A point in which the rays of light meet, after… … The Collaborative International Dictionary of English
Focus tube — Focus Fo cus (f[=o] k[u^]s), n.; pl. E. {Focuses} (f[=o] k[u^]s*[e^]z), L. {Foci} (f[=o] s[imac]). [L. focus hearth, fireplace; perh. akin to E. bake. Cf. {Curfew}, {Fuel}, {Fusil} the firearm.] 1. (Opt.) A point in which the rays of light meet,… … The Collaborative International Dictionary of English
focus — fo‧cus [ˈfəʊkəs ǁ ˈfoʊ ] noun [uncountable] MARKETING when a company tries to serve particular groups of customers in a market with particular needs, rather than trying to serve the whole market focuser noun [countable] : • The focuser seeks to… … Financial and business terms
focus — {{Roman}}I.{{/Roman}} noun 1 special interest/attention ADJECTIVE ▪ central, main, major, primary, prime, principal, real ▪ important, speci … Collocations dictionary
Focus (optics) — An image that is partially in focus, but mostly out of focus in varying degrees. In geometrical optics, a focus, also called an image point, is the point where light rays originating from a point on the object converge.[1] Although the focus is… … Wikipedia
Principal Speaker — Principal Speakers were the public spokespersons of the Green Party of England and Wales but have since been replaced in the party by a national Leader and Deputy Leader. There were two Principal Speakers, one female and one male, who were… … Wikipedia
Principal photography of The Lord of the Rings film trilogy — Principal photography for The Lord of the Rings film trilogy was conducted concurrently in New Zealand from October 11, 1999 through to December 22, 2000 for 274 days. Pick up shoots were conducted annually from 2001 to 2004. The trilogy was shot … Wikipedia
