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antivitamin

[an-tee-vahy-tuh-min, an-tahy- or, British, -vit-uh-min]
noun Biochemistry.
  1. any substance that interferes with the action of a vitamin.
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Origin of antivitamin

First recorded in 1925–30; anti- + vitamin
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

antivitamin in Medicine

antivitamin

(ăn′tē-vītə-mĭn, ăn′tī-)
n.
  1. A substance that prevents a vitamin from exerting its typical metabolic effects.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.