Medical dictionary. 2011.
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
Foci — 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 — principalship, n. /prin seuh peuhl/, adj. 1. first or highest in rank, importance, value, etc.; chief; foremost. 2. of, of the nature of, or constituting principal or capital: a principal investment. 3. Geom. (of an axis of a conic) passing… … Universalium
HEBREW LITERATURE, MODERN — definition and scope beginnings periodization … Encyclopedia of Judaism
cardinal point — noun Etymology: cardinal (I) 1. a. : one of the four principal points of the compass north, south, east, and west b. in magical ritu … Useful english dictionary
Focal length — The focal length of an optical system is a measure of how strongly it converges (focuses) or diverges (diffuses) light. A system with a shorter focal length has greater optical power than one with a long focal length. Thin lens approximation For… … Wikipedia
cardinal points — 1. a group of points on the optic axis, including the nodal points, the principal foci, and the optic center; they may include conjugate focal points of the object and image. Called also principal p s. 2. four points within the pelvic inlet: the… … Medical dictionary
cardinal point — /kadənəl ˈpɔɪnt/ (say kahduhnuhl poynt) noun 1. one of the four chief directions of the compass; the north, south, east, and west points. 2. Optics any of the six points significant in the design of a lens, comprising the two principal foci, the… …
James M. Edie — Infobox Philosopher region = Continental Philosophy era = 20th century philosophy color = #B0C4DE name = James M. Edie birth = November 3, 1927 death = February 21, 1998 school tradition = Phenomenology main interests = Contemporary continental… … Wikipedia
Hyperbola — This article is about a geometrical curve, a conic section. For the term used in rhetoric, see Hyperbole … Wikipedia
