/meg"euh vuy'teuh min/ ; Brit. also /meg"euh vit'euh min/ , adj.
1. of, pertaining to, or using very large amounts of vitamins: megavitamin therapy. Cf. orthomolecular .
n.
2. megavitamins , doses of vitamins much larger than the recommended dietary allowances.
[ 1965-70; MEGA- + VITAMIN ]