(history) Forming the names of dynasts, being suffixed to the name of their progenitors and meaning “descendant of”. · (taxonomy) Forming the common names of members of a taxon which has a name ending in -idae.
Borrowed from Latin Atrīdae, from Ancient Greek Ἀτρεῖδαι (Atreîdai), nominative plural of Ancient Greek Ἀτρείδης (Atreídēs). By surface analysis, Atreus + -id.