midsection
noun
mid·sec·tion
| \ ˈmid-ˌsek-shən
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Definition of midsection
: a middle section, part, or area : a section midway between the extremes
Normally, the jet stream, a five-mile-high river of air, steers storms directly across the midsection of the United States…— Stephen H. Schneider
especially
: the mid-region of the human torso : midriff sense 1
The swinging motion of baseball players and golfers requires strength throughout the entire midsection, not only to hit the ong ball but also to avoid injuries. — Joe Weider The two doctors ordered a CT scan of the man's midsection, and they stood next to a computer terminal and toggled through images of his internal organs, deeply concerned. — Gardiner Harris