noun
thorax
THOR-aks/ˈθɔːræks/
The body section between the neck or head and the abdomen.
The overlay shows the ribs enclosing the man’s thorax.

Etymology
Greek thōrax meant both “breastplate” and “chest”; its medical sense probably arose from the armor sense. This suggests a protective-covering image behind the anatomical term, though the Greek word’s deeper origin is unknown.
In context
your thorax — or thoracic region — is going to be the area between your neck and your abdomen. It includes the ribs, or the rib cage
More examples
- The diagram shows the thorax between the neck and abdomen.
- The doctor examines the patient's thorax.
- She labels the head, thorax, and abdomen of the specimen.
Forms
thorax · thoraxes · thoraces