the GNU version of the Collaborative International Dictionary of English
adj. Within the thorax or chest.
The Century Dictionary and Cyclopedia
Situated or occurring within the thorax or chest: as, the heart and lungs are intrathoracic organs.
Word Usage
"These haemorrhages are caused by sudden changes of the intravascular blood pressure as a result of a compression of intrathoracic great vessels by a shock wave caused by a penetrating bullet."