pubo-assumed combining form of L. pūbēs (of which the actual stem is pūbi-, and the modern L. and F. assumed form pubio-). The form pubo- is indefensible etymologically, but is recognized in Billings Nat.Med.Dict. 1890, and Syd. Soc.Lex. 1895, as the current English form in combinations having the sense ‘Of or belonging to the pubes or os pubis, in conjunction with (some other part)’. Such are the adjs.pubo-femoral, belonging to the pubes and the femur (as in pubo-femoral ligament), pubo-iliac, pubo-ischiatic (as in pubo-ischiatic bone), pubo-prostatic (as in pubo-prostatic ligaments), pubo-tibial, pubo-vesical, belonging to the pubes and the bladder (as in pubo-vesical ligaments, pubo-vesical muscles), etc.1890in Billings Nat.Med.Dict.Ibid., Pubo-ischiatic bone,..the combined ischium and [os] pubis (Henle).1895in Syd. Soc.Lex.