plural thoraxes or thoraces /ˈθorəˌsiːz/ plural thoraxes or thoraces /ˈθorəˌsiːz/ Learner's definition of THORAX
[count] technical
1
: the part of an animal's body between the neck and the waist（动物的）胸，胸腔
2
: the middle section of an insect's body（昆虫的）胸，胸部
— thoracic
/θəˈræsɪk/ adjective