pectoral
pec-tor-al
noun
A large muscle in the chest, or a fin near a fish's head.
"He trained his pectorals for strength."
adjective
Relating to or located in the chest area of the body.
"The bird has distinctive pectoral markings."
Thesaurus
Synonyms: pectoral muscle, pectoralis, musculus pectoralis, pecs, thoracic, pectoral medallion