Medical Dictionary

beta be·ta (bā'tə, bē'-)

  1. Symbol β The second letter of the greek alphabet.

  2. The second item in a series or system of classification.

  3. A beta particle.

  4. A beta ray.

  1. Of or relating to the second position from a designated carbon atom in an organic molecule at which an atom or a radical may be substituted.

  2. Of or relating to an isomeric variation of a chemical compound, such as a stereoisomer.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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