/sin"i grin/ , n. Chem.
a colorless, crystalline, water-soluble solid, KC 10 H 16 NO 9 S 2 ·H 2 O, found chiefly in the seeds of the black mustard, that deters some insect predators. Also called potassium myronate .
[ 1875-80; Sin ( apis n ) igr ( a ) species yielding black mustard seed (lit., black mustard; see SINAPINE, NEGRO) + -IN 2 ]