pubio-assumed combining form of pubes (of which the L. stem is actually pubi-).This appears to be the usual form in modern L. anatomical terms, as pubio-femoralis, -prostaticus, etc., whence also in the English equivalent forms pubio-femoral (so mod.F.), pubio-ischiadic, pubio-ischiatic, pubio-prostatic, pubio-sternal, pubio-umbilical, pubio-urethral. But in Billings Nat.Med.Dict. 1890 only the corresponding forms in pubo- are given as Eng., and in Syd. Soc.Lex. 1895 most of those in pubio- are referred to pubo-.
pubio- combining form Etymology: New Latin, from pubis : pubis