| stoat | <zoology> The ermine in its summer pelage, when it is reddish brown, but with a black tip to the tail. The name is sometimes applied also to other brown weasels. Origin: OE. Stot a stoat, horse, bullock; perhaps originally only of male animals, and akin to D. Stooten to push, E. Stutter; cf. Icel. Sttr a bull, Sw. Stut a bullock. Cf. Stot. Source: Websters Dictionary (01 Mar 1998) |
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| stobadine N-oxidase | <enzyme> Forms stobadine n-oxide Registry number: EC 1.7.- (26 Jun 1999) |
| stochastic | Random or probabilistic event. (18 Nov 1997) |
| stochastic independence | Independence of two or more events or variables; the state in which their joint probability or distribution is equal to the product of their marginal probabilities or distributions. (05 Mar 2000) |
| stochastic model | <epidemiology> A mathematical model which takes into consideration the presence of some randomness in one or more of its parameters or variables. The predictions of the model therefore do not give a single point estimate but a probability distribution of possible estimates. Contrast with deterministic. We might distinguish demographic stochasticity which arises from the discreteness of individuals and individual events such as birth, and environmental stochasticity arising from more-or-less unpredictable interactions with the outside world. (05 Dec 1998) |
| stochastic process | A process that incorporates some element of randomness. Origin: G. Stochastikos, pertaining to guessing, fr. Stochazomai, to guess (05 Mar 2000) |
| stochastic processes | Processes that incorporate some element of randomness, used particularly to refer to a time series of random variables. (12 Dec 1998) |
| stock | Group of organisms (all of the same species) that is genetically self-sustaining and isolated geographically or temporally during reproduction. (09 Oct 1997) |
| stock culture | A culture of a microorganism maintained solely for the purpose of keeping the microorganism in a viable condition by subculture, as necessary, into fresh medium. (05 Mar 2000) |
| stock strain | A bacterial or other microbial strain that has been maintained under laboratory conditions as representative of its type. (05 Mar 2000) |
| stock vaccine | A vaccine made from a stock microbial strain, in contradistinction to an autogenous vaccine. (05 Mar 2000) |
| Stock, Wolfgang | <person> German ophthalmologist, 1874-1956. See: Spielmeyer-Stock disease. (05 Mar 2000) |
| stockdove | <zoology> A common European wild pigeon (Columba aenas), so called because at one time believed to be the stock of the domestic pigeon, or, according to some, from its breeding in the stocks, or trunks, of trees. The name is applied, also, to other related species, as the Indian stockdove (Palumbaena Eversmanni). Source: Websters Dictionary (01 Mar 1998) |
| Stocker | Frederick William, U.S. Ophthalmologist, 1893-1974. See: Stocker's line. (05 Mar 2000) |
| Stocker's line | A fine line of pigment in the corneal epithelium near the head of a pterygium. (05 Mar 2000) |