BETAINE
Be"ta*ine, n. Etym: [From beta, generic name of the beet.] (Chem.)
Defn: A nitrogenous base, C5H11NO2, produced artificially, and also occurring naturally in beetroot molasses and its residues, from which it is extracted as a white crystalline substance; — called also lycine and oxyneurine. It has a sweetish taste.
BETAKE
Be*take", v. t. [imp. Betook; p. p. Betaken; p. pr. & vb. n.
Betaking.] Etym: [Pref. be- + take.]
1. To take or seize. [Obs.] Spenser.
2. To have recourse to; to apply; to resort; to go; — with a
reflexive pronoun.
They betook themselves to treaty and submission. Burke.
The rest, in imitation, to like arms Betook them. Milton.
Whither shall I betake me, where subsist Milton.
3. To commend or intrust to; to commit to. [Obs.]
BETA RAYS
Be"ta rays. (Physics)
Defn: Penetrating rays readily deflected by a magnetic or electric field, emitted by radioactive substances, as radium. They consist of negatively charged particles or electrons, apparently the same in kind as those of the cathode rays, but having much higher velocities (about 35,000 to 180,000 miles per second).
BETAUGHT Be*taught",a. Etym: [p. p. of OE. bitechen, AS. bet, to assign, deliver. See Teach.]
Defn: Delivered; committed in trust. [Obs.]