coxaPronunciation: /ˈkɒksə/Definition of coxa noun (plural coxae /-siː/) 1 Anatomy the hip bone or hip joint. 2 Entomology the first or basal segment of the leg of an insect. Derivatives coxal adjective Origin: late 17th century: from Latin, 'hip'coxa in other Oxford dictionaries Definition of coxa in the US English dictionary