#occipital_bone__occipitalbone  a saucer-shaped membrane bone that forms the back of the skull
  supertype:  #membrane_bone  any bone that develops within membranous tissue without previous cartilage formation; e.g. the clavicle and bones of the skull
  part of:  #cranium
  part:  #inion  the craniometric point that is the most prominent point at the back of the head (at the occipital protuberance)
  part:  #occipital_protuberance__occipitalprotuberance  prominence on the outer surface of the occipital bone

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