megavitamin

[ meg-uh-vahy-tuh-min; British also meg-uh-vit-uh-min ]

adjective

1. of, relating to, or using very large amounts of vitamins: Compare orthomolecular.

   megavitamin therapy.

noun

1. megavitamins, doses of vitamins much larger than the recommended dietary allowances.

Word History and Origins

Origin of megavitamin¹

First recorded in 1965–70; mega- + vitamin