a substance that inhibits the effects of a vitamin
antivitamin in American English
(ˌæntiˈvaitəmɪn, ˌæntai-, Brit -ˈvɪtəmɪn)
noun
Biochemistry
any substance that interferes with the action of a vitamin
Word origin
[1925–30; anti- + vitamin]This word is first recorded in the period 1925–30. Other words that entered Englishat around the same time include: buildup, distinctive feature, gimmick, off-line, turnaroundanti- is a prefix meaning “against,” “opposite of,” “antiparticle of,” used in the formationof compound words (anticline); used freely in combination with elements of any origin (antibody; antifreeze; antiknock; antilepton)