optically inactive
Inactive In*ac"tive, a. [Pref. in- not + active: cf. F. inactif.] [1913 Webster] 1. Not active; having no power to move; that does not or can not produce results; inert; as, matter is, of itself, inactive. [1913 Webster]

2. Not disposed to action or effort; not diligent or industrious; not busy; idle; as, an inactive officer. [1913 Webster]

3. (Chem. & Opt.) Not exhibiting any action or activity on polarized light; {optically inactive}; optically neutral; -- said of isomeric forms of certain substances, in distinction from other forms which are optically active; as, racemic acid is an inactive tartaric acid. [1913 Webster]

4. (Chem. & Biochem.) Lacking biological or biochemical activity; not causing a specific biological or biochemical effect; -- said of substances such as enzymes which have lost their catalytic power, or of small molecules which are tested for some type of biological activity and found to lack that activity; as, after boiling for ten minutes, the enzyme was totally inactive; the methyl analog was inactive as an antibiotic. [PJC]

Syn: Inert; dull; sluggish; idle; indolent; slothful; lazy. See {Inert}. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • Optically inactive — Optically Op tic*al*ly, adv. 1. By optics or sight. [1913 Webster] 2. With reference to optics. [1913 Webster] {Optically active}, {Optically inactive} (Chem. Physics), terms used of certain isomeric substances which, while identical with each… …   The Collaborative International Dictionary of English

  • optically inactive — adj INACTIVE (c(2)) …   Medical dictionary

  • optically inactive — adjective : inactive c (2) …   Useful english dictionary

  • optically inactive crystal — optiškai neaktyvus kristalas statusas T sritis fizika atitikmenys: angl. optically inactive crystal vok. optisch inaktiver Kristall, m rus. оптически неактивный кристалл, m pranc. cristal optiquement inactif, m …   Fizikos terminų žodynas

  • Inactive — In*ac tive, a. [Pref. in not + active: cf. F. inactif.] [1913 Webster] 1. Not active; having no power to move; that does not or can not produce results; inert; as, matter is, of itself, inactive. [1913 Webster] 2. Not disposed to action or… …   The Collaborative International Dictionary of English

  • Optically — Op tic*al*ly, adv. 1. By optics or sight. [1913 Webster] 2. With reference to optics. [1913 Webster] {Optically active}, {Optically inactive} (Chem. Physics), terms used of certain isomeric substances which, while identical with each other in… …   The Collaborative International Dictionary of English

  • Optically active — Optically Op tic*al*ly, adv. 1. By optics or sight. [1913 Webster] 2. With reference to optics. [1913 Webster] {Optically active}, {Optically inactive} (Chem. Physics), terms used of certain isomeric substances which, while identical with each… …   The Collaborative International Dictionary of English

  • Optically negative — Optically Op tic*al*ly, adv. 1. By optics or sight. [1913 Webster] 2. With reference to optics. [1913 Webster] {Optically active}, {Optically inactive} (Chem. Physics), terms used of certain isomeric substances which, while identical with each… …   The Collaborative International Dictionary of English

  • Optically positive — Optically Op tic*al*ly, adv. 1. By optics or sight. [1913 Webster] 2. With reference to optics. [1913 Webster] {Optically active}, {Optically inactive} (Chem. Physics), terms used of certain isomeric substances which, while identical with each… …   The Collaborative International Dictionary of English

  • inactive tartaric acid — mesotartaric mes o*tar*tar ic, a. [Meso + tartaric.] (Chem.) Pertaining to, or designating, an acid called also {inactive tartaric acid}. It is an optically inactive stereoisomer of tartaric acid due to internal compensation of the rotatory… …   The Collaborative International Dictionary of English

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