The Collaborative International Dictionary of English v.0.48:
Homocentric \Ho`mo*cen"tric\, a. [Gr. ?: ? the same + ? center: cf. F. homocentrique.] Having the same center. [1913 Webster]WordNet (r) 3.0 (2006):
homocentric adj 1: having a common center; "concentric rings" [syn: concentric, concentrical, homocentric] [ant: eccentric, nonconcentric]