n. In anatomy and zoology, a pubic bone, or bone of the pubes (os pubis); a distal inferior and anterior division of the pelvic arch, forming a part of the os innominatum or haunch-bone by ankylosis at the acetabulum with the ilium and ischium, and often, as in man and most mammals, united also with the ischium to circumscribe the obturator foramen, and, with its fellow of the opposite side, forming the pubic symphysis.