the part of the body below the chest that contains the stomach, bowels, etc. 腹（部） Patients reported pain in the lower chest or upper abdomen. 病人有的说下胸疼痛、有的说上腹疼痛。
the end part of an insect’s body that is attached to its thorax （昆虫的）腹部 
Word Originmid 16th cent.: from Latin.