This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. A middle section, especially the midriff of the human body.

n. The middle section of something.

n. The midriff; the section of the human torso, from below the chest to above the waist.

n. the middle area of the human torso (usually in front)

"The dullish midsection is redeemed by the latter part of the book, though."

region    area   

groin    buttock    sternum    biceps    torso