be·ta /ˈbetə/ 名詞
希臘字母表的第二個字母 (Β, β)
Be·ta n. The second letter of the Greek alphabet, B, β. See B, and cf. etymology of Alphabet.
Note: Beta (B, β) is used variously for classifying, as: (a) Astron. To designate some bright star, usually the second brightest, of a constellation, as, β Aurigæ. (b) Chem. To distinguish one of two or more isomers; also, to indicate the position of substituting atoms or groups in certain compounds; as, β-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.
adj 1: second in order of importance; "the candidate, considered a
beta male, was perceived to be unable to lead his
party to victory"
2: preliminary or testing stage of a software or hardware
product; "a beta version"; "beta software"
n 1: the 2nd letter of the Greek alphabet
2: beets [syn: genus Beta]