tho ‧ rax /ˈθɔːræks/ BrE AmE noun ( plural thoraxes or thoraces /-rəsiːz/) [countable]
[ Date: 1300-1400 ; Language: Latin ; Origin: Greek ]
1 . technical the part of your body between your neck and ↑ diaphragm (=area just above your stomach)
2 . the part of an insect’s body between its head and its ↑ abdomen
—thoracic /θɔːˈræsɪk/ adjective