exstantia
From LSJ
ἄνω ποταμῶν ἱερῶν χωροῦσι παγαί → the springs of sacred rivers flow upward, backward to their sources flow the streams of holy rivers
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