australopith /ˈɒstɹələˌpɪθ/adjective 1noun 1forms 4 adjective1 •Of or pertaining to the hominids of the extinct genus Australopithecus. noun1 •Any of the hominids of the extinct genus Australopithecus. formsAustralopiths · australopiths · more australopith · most australopith