Medical Dictionary

retinoic acid

noun ret·i·no·ic acid \ˌret-ən-ˌō-ik-\

Medical Definition of RETINOIC ACID

:  either of two isomers of an acid C20H28O2 derived from vitamin A and used especially in the treatment of acne: a or all–trans–retinoic acid :  tretinoin b or 13–cis–retinoic acid :  isotretinoin
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears