| instant | 1. A point in duration; a moment; a portion of time too short to be estimated; also, any particular moment. "There is scarce an instant between their flourishing and their not being." (Hooker) 2. A day of the present or current month; as, the sixth instant; an elliptical expression equivalent to the sixth of the month instant, i. E, the current month. See Instant. Synonym: Moment, flash, second. Origin: F. Instant, fr. L. Instans standing by, being near, present. See Instant. Source: Websters Dictionary (01 Mar 1998) |
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| plus | 1. <mathematics> More, required to be added; positive, as distinguished from negative; opposed to minus. 2. Hence, in a literary sense, additional; real; actual. "Success goes invariably with a certain plus or positive power." (Emerson) 3. <mathematics> Plus sign, the sign (+) which denotes addition, or a positive quantity. Origin: L, more; akin to Gr, and cf. Piu, Pleonasm. (11 Mar 1998) |
| plus lens | A converging lens. Synonym: plus lens. (05 Mar 2000) |
| plus strand | See: replicative form. (05 Mar 2000) |
| fluorescence plus Giemsa stain | <technique> A stain used to demonstrate sister chromatid exchange; cells are grown in 5-bromodeoxyuridine, followed by chromosome preparation, staining in Hoechst 33258, exposure to light, and staining in Giemsa; chromosomes exhibit a "harlequin" appearance. (05 Mar 2000) |