ˈsinə̇grə̇n noun
( -s )
Etymology: International Scientific Vocabulary sinigr- (from New Latin Sinapis nigra, genus of black mustard seed) + -in
: a crystalline glucoside CH 2 . CHCH 2 C(SC 6 H 11 O 5 ) . NOSO 3 K found in the seeds of black mustard ( Brassica nigra ) and other brassicas that on enzymatic hydrolysis by myrosin yields glucose, potassium hydrogen sulfate, and allyl isothiocyanate by Lossen rearrangement — compare mustard oil