umbonumDictionary entriesumbo, umbonis:Masculine · Noun · 3rd declensionFrequency:Lesser= boss (of a shield);Entry →gen. pl.ExamplesAeneid VIIP. Vergilius Maro (Vergil) from The Aeneid"...turrigerae Antemnae. tegmina tuta cavant capitum flectuntque salignas umbonum cratis; alii thoracas aenos aut levis ocreas lento ducunt..."