BET
Bet, v. t. [imp. & p. p. Bet, Betted; p. pr. & vb. n. Betting.]

Defn: To stake or pledge upon the event of a contingent issue; to
wager.
John a Gaunt loved him well, and betted much money on his head. Shak.
I'll bet you two to one I'll make him do it. O. W. Holmes.

BET
Bet,

Defn: imp. & p. p. of Beat. [Obs.]

BET
Bet, a. & adv.

Defn: An early form of Better. [Obs.] To go bet, to go fast; to hurry. [Obs.] Chaucer.

BETA
Be"ta, n. [Gr. bh a.]

Defn: The second letter of the Greek alphabet, B, b. See B, and cf. etymology of Alphabet. Beta (B, b) is used variously for classifying, as: (a) (Astron.) To designate some bright star, usually the second brightest, of a constellation, as, b 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, b-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.

BETACISM; BETACISMUS
Be"ta*cism, Be`ta*cis"mus, n.

Defn: Excessive or extended use of the b sound in speech, due to conversion of other sounds into it, as through inability to distinguish them from b, or because of difficulty in pronouncing them.