The cyclic system of four pyrrole rings forming the central structure of the vitamin B12 and related compounds.

Nearby words

  1. corrigan,
  2. corrigan's pulse,
  3. corrigan, mairead,
  4. corrigendum,
  5. corrigible,
  6. corrival,
  7. corroborant,
  8. corroborate,
  9. corroboration,
  10. corroborative

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

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