- The thorax is defined as the part of the body between the head and the abdomen.
An example of the thorax is where the lungs are located under the ribcage.
nounpl. thoraxes or thoraces
- in tetrapods, including humans,
- the part of the body cavity from the neck or head to the abdomen, containing the heart, lungs, etc.; chest: in mammals, the diaphragm separates it from the abdomen
- the area of the trunk covering this part
- in arthropods, the body segment between the head and abdomen to which the legs are attached
Origin of thoraxMiddle English ; from Classical Latin ; from Classical Greek thōrax, chest, breastplate
nounpl. tho·rax·es or tho·ra·ces
- The part of the human body between the neck and the diaphragm, partially encased by the ribs and containing the heart and lungs; the chest.
- A part in other vertebrates that corresponds to the human thorax.
- The second or middle region of the body of certain arthropods, including the insects and most crustaceans, lying between the head and the abdomen.
Origin of thoraxMiddle English, from Latin thōrāx, breastplate, chest, from Greek.
(plural thoraces or thoraxes)
From Ancient Greek θώραξ (thōraks, “a breastplate, cuirass, corslet”)