/kooh"meuh rin/ , n.
a fragrant crystalline substance, C 9 H 6 O 2 , obtained from the tonka bean, sweet clover, and certain other plants or prepared synthetically, used chiefly in soaps and perfumery.
Also, cumarin .
[ 1820-30; coumarine, equiv. to coumar ( ou ) tonka-bean tree ( cumarú
cumaru ) + -ine -IN 2 ]