(at regular intervals)
51India — /in dee euh/, n. 1. Hindi, Bharat. a republic in S Asia: a union comprising 25 states and 7 union territories; formerly a British colony; gained independence Aug. 15, 1947; became a republic within the Commonwealth of Nations Jan. 26, 1950.… …
52animal learning — ▪ zoology Introduction the alternation of behaviour as a result of individual experience. When an organism can perceive and change its behaviour, it is said to learn. That animals can learn seems to go without saying. The cat that… …
53irregular — ir·reg·u·lar ( )ir (r)eg yə lər adj 1) lacking perfect symmetry of form: not straight, smooth, even, or regular <irregular teeth> 2 a) lacking continuity or regularity of occurrence, activity, or function <irregular breathing> b) of a …
54periodical — I (New American Roget s College Thesaurus) n. magazine, journal, quarterly, weekly, monthly, zine (sl.). See publication. II (Roget s IV) modif. Syn. periodic, rhythmic, regular, cyclic, cyclical, fluctuating, orbital, pendulumlike, recurrent,… …
55Periodic function — Not to be confused with periodic mapping, a mapping whose nth iterate is the identity (see periodic point). In mathematics, a periodic function is a function that repeats its values in regular intervals or periods. The most important examples are …
56Apollo Guidance Computer — and DSKY Invented by MIT Instrumentation Laboratory Manufacturer Raytheon Introduced August 1966 …
57Geomagnetic reversal — Magnetic reversal redirects here. For switching of a magnet, see Magnetization reversal. Geomagnetic polarity during the late Cenozoic Era. Dark areas denote periods where the polarity matches today s polarity, light areas denote periods where… …
58United States — a republic in the N Western Hemisphere comprising 48 conterminous states, the District of Columbia, and Alaska in North America, and Hawaii in the N Pacific. 267,954,767; conterminous United States, 3,022,387 sq. mi. (7,827,982 sq. km); with… …
59magazine — magazinish, magaziny, adj. /mag euh zeen , mag euh zeen /, n. 1. a publication that is issued periodically, usually bound in a paper cover, and typically contains essays, stories, poems, etc., by many writers, and often photographs and drawings,… …
60rhythm — rhythmless, adj. /ridh euhm/, n. 1. movement or procedure with uniform or patterned recurrence of a beat, accent, or the like. 2. Music. a. the pattern of regular or irregular pulses caused in music by the occurrence of strong and weak melodic… …
