See Also: antivitamin(medicine)

acaulescent (iou) and antivitamin (medicine)


acaulescent (iou)



acaulescent adjective. M19.
[from A-10 + CAULESCENT.]
Botany. Stemless or apparently so.

antivitamin (medicine)


antivitamin


A substance that prevents a vitamin from exerting its typical biological effects. Most antivitamin's have chemical structures similar to vitamins (e.g., pyridoxine and its antivitamin, deoxypyridoxine) and appear to function as competitive antagonists; some antivitamin's produce effects, in addition, that are unrelated to vitamin antagonism.