midsection

From mid- + section.

• IPA^(key): /ˈmɪdˌsɛkʃən/

midsection (plural midsections)

1. The middle section of something.
2. (anatomy) The midriff; the section of the human torso, from below the chest to above the waist.
   • 2010, Bill Geiger, “6-pack Abs in 9 Weeks”, in Reps!, 17:106:

     That's the premise of the overload principle, and it must be applied, even to ab training, if you're going to develop a cut, ripped midsection.