"chest of the body," late 14c., from Latin thorax "the breast, chest; breastplate," from Greek thōrax (genitive thōrakos) "breastplate, chest," of unknown origin.
Entries linking to thorax
cephalothorax n.
"front part of crustaceans, spiders, etc., consisting of the head and thorax blended together," 1829, from cephalo- "head" + thorax. Perhaps from French or German.
pneumothorax n.
"presence of air in the pleural cavity," 1821, from French pneumothorax (1803), coined by French physician Jean Marc Gaspard Itard (1774-1838) from Greek pneumon "lung" (see pneumo-) + thorax.