Home › Words › O › onosmaonosmaonosma means any flowering plant of the genus Onosma, of the family Boraginaceae.EtymologyBorrowed from translingual Onosma, from Ancient Greek ὄνοσμᾰ (ónosmă).nounAny flowering plant of the genus Onosma, of the family Boraginaceae.Definitions & examples from Wiktionary (CC BY-SA 3.0).