Search Result for "membrane bone":
Wordnet 3.0

NOUN (1)

1. any bone that develops within membranous tissue without previous cartilage formation; e.g. the clavicle and bones of the skull; 



WordNet (r) 3.0 (2006):

membrane bone
    n 1: any bone that develops within membranous tissue without
         previous cartilage formation; e.g. the clavicle and bones
         of the skull