Synonyms for Pectoral (same or very similar meaning)
WordNet sense 1 (either of two large muscles of the chest):
pecs, pectoralis, musculus pectoralis, pectoral muscleWordNet sense 2 (an adornment worn on the chest or breast):
pectoral medallionWordNet sense 3 (of or relating to the chest or thorax):
thoracicFrom the ODE community, based on WordNetadd/edit