osmazome
A substance formerly supposed to impart the characteristic meaty smell and taste to certain dishes.
dated, uncountable
The greatest service chemistry has rendered to alimentary science, is the discovery of osmazome, or rather the determination of what it was. […] Osmazome, discovered after having been so long the delight of our fathers, may be compared to alcohol, which made whole generations drunk before it was simply exhibited by distillation.
Where it comes from
From Ancient Greek ὀσμή (osmḗ, “smell”) + ζωμός (zōmós, “meat-soup”).
Adapted from the Wiktionary entry osmazome (CC BY-SA 4.0).