'Beta' definitions:

Definition of 'beta'

(from WordNet)
adjective
Second in order of importance; "the candidate, considered a beta male, was perceived to be unable to lead his party to victory"
adjective
Preliminary or testing stage of a software or hardware product; "a beta version"; "beta software"
noun
The 2nd letter of the Greek alphabet
noun
Beets [syn: Beta, genus Beta]

Definition of 'Beta'

From: GCIDE
  • 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.] Betacism