(ˈ)āˈn(y)ümənə, apˈn- noun plural
or apneu·mo·nes -məˌnēz
Usage: capitalized
Etymology: New Latin, from a- (II) + -pneumona, -pneumones (from Greek pneumon-, pneumōn lung) — more at pneumonia
: a formerly recognized division of Holothurioidea comprising forms lacking an internal respiratory apparatus — compare pneumonophora
• apneu·mo·nous (ˈ)ā|n-, (ˈ)ap|n- adjective