noun Etymology: Roussel-UCLAnglo-French, the drug's French manufacturer + 486, laboratory serial number Date: 1983 a drug C 29 H 35 NO 2 taken orally to induce abortion especially early in pregnancy by blocking the body's use of progesterone
RU-486
Meaning of RU-486 in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012