1. 胸部;胸腔;胸廓
Your thorax is the part of your body between your neck and your waist.

2. (昆虫的)胸部，胸节
An insect's thorax is the central part of its body to which the legs and wings are attached.

1. part of an insect's body that bears the wings and legs

2. the part of the human torso between the neck and the diaphragm or the corresponding part in other vertebrates

Synonym: chestpectus

3. the middle region of the body of an arthropod between the head and the abdomen