Webster’s Revised Unabridged Dictionary · 1913
Osmazome
Os′ma·zome, n. [Gr. ὀσμή smell, odor + ζωμός broth: cf. F. osmazôme.] (Old Chem.) A substance formerly supposed to give to soup and broth their characteristic odor, and probably consisting of one or several of the class of nitrogenous substances which are called extractives.