exstantia
From LSJ
Latin > English (Lewis & Short)
exstantĭa: (ext-), ae, f. exsto,
I a standing out, prominence, projection (postAug.), Col. 5, 5, 12: ventris, Cael. Aur. Tard. 1, 5.
Latin > French (Gaffiot 2016)
exstantĭa, æ, f., avance, saillie, proéminence : Col. Rust. 5, 5, 12 || enflure : C. Aur. Chron. 1, 5.