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carbonium in Medicine

carbonium

(kär-bōnē-əm)
n.
  1. An organic cation having one less electron than a corresponding free radical and with positive charge localized on the carbon atom.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.