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megavitamin

[meg-uh-vahy-tuh-min; British also meg-uh-vit-uh-min]
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adjective
  1. of, relating to, or using very large amounts of vitamins: megavitamin therapy.Compare orthomolecular.
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noun
  1. megavitamins, doses of vitamins much larger than the recommended dietary allowances.
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Origin of megavitamin

First recorded in 1965–70; mega- + vitamin
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
megavitamin in Medicine

megavitamin

(mĕg′ə-vī′tə-mĭn)
n.
  1. A dose of a vitamin greatly exceeding the amount required to maintain health.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.