Beta

Beta
Beta Be"ta, n. [Gr. bh^ta.] The second letter of the Greek alphabet, B, [beta]. See {B}, and cf. etymology of {Alphabet}.

Note: Beta (B, [beta]) is used variously for classifying, as: (a) (Astron.) To designate some bright star, usually the second brightest, of a constellation, as, [beta] Aurig[ae]. (b) (Chem.) To distinguish one of two or more isomers; also, to indicate the position of substituting atoms or groups in certain compounds; as, [beta]-naphthol. With acids, it commonly indicates that the substituent is in union with the carbon atom next to that to which the carboxyl group is attached. [Webster 1913 Suppl.]


The Collaborative International Dictionary of English. 2000.

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  • BETA — Класс языка: объектно ориентированное программирование Появился в: 1992 Автор(ы): Кристен Нюгорд, Ole Lehrmann Madsen, Birger Møller Pedersen и Bent Bruun Kristensen Типизация данных: строгая, статическая Основны …   Википедия

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  • beta — s.m. 1. A doua literă a alfabetului grecesc, corespunzând sunetului b. 2. (fiz.; în sintagmele) Particulă beta = electron negativ sau pozitiv emis de unele substanţe radioactive. Radiaţie beta = radiaţie constituită din particule beta. – Din fr.… …   Dicționar Român

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  • bêta- — ❖ ♦ Élément (écrit aussi β ) utilisé en chimie organique pour caractériser le deuxième d une série d isomères, indiquer la présence dans un composé d un atome de carbone séparant deux fonctions, préciser la structure stéréochimique des sucres,… …   Encyclopédie Universelle

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