"pectoral" in the noun sense
1. pectoral, pectoral muscle, pectoralis, musculus pectoralis, pecs
either of two large muscles of the chest
2. pectoral, pectoral medallion
an adornment worn on the chest or breast
"pectoral" in the adjective sense
1. pectoral, thoracic
of or relating to the chest or thorax
Source: WordNet® (An amazing lexical database of English)
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