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betacism in Medicine

betacism

(bātə-sĭz′əm, bē-)
n.
  1. A defect in speech in which the sound of b is given to other consonants.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.