aeromantia
From LSJ
ἐν ταῖς ἀνάγκαις χρημάτων κρείττων φίλος → it is better in times of need to have friends rather than money, a friend in need is a friend indeed (Menander, Sententiae monostichoi 143)
Latin > English (Lewis & Short)
āĕrŏmantīa: ae, f., = ἀερομαντεία,
I divination from the state of the air, aëromancy, Isid. Orig. 8, 9.
Latin > French (Gaffiot 2016)
āĕrŏmantīa, æ, f. (ἀερομαντεία), aéromancie, divination d’après l’état du ciel : Isid. Orig. 8, 9, 13.
Latin > German (Georges)
āeromantīa, ae, f. (*ἀερόμαντις), das Wahrsagen aus der Luft, Isid. 8, 9, 13. Mythogr. Lat. 3, 12.