human / humin [ˈhju:mən]
human – adj. & n. – adj. 1. of, belonging to or charactgeristic of people; 2. of or belonging to the genus Homo; n. – a human being
humin – n. – 1. any of various dark-coloured, insoluble, usually amorphous substances formed in many reactions; 2. a substance obtained from humus (as the residue from treatment with cold alkali); 3. a pigment formed in the acid hydrolysis of protein containing tryptophan