ˈhyümə̇n noun
( -s )
Etymology: German, from New Latin humus + German -in
: any of various dark-colored insoluble usually amorphous substances formed in many reactions: as
a. : a substance obtained from humus (as the residue from treatment with cold alkali)
b. : a pigment formed in the acid hydrolysis of protein containing tryptophan — compare melanoidin