plenilunium

Ζῆν οὐκ ἄξιος, ὅτῳ μηδὲ εἷς ἐστι χρηστὸς φίλος → Life is not worth living if you do not have at least one friend.

Latin > English (Lewis & Short)

plēnĭlūnĭum: ii, n. (sc. tempus) plenus-luna,
I the full moon (post-Aug. for luna plena), Col. 11, 2, 85: cum vero occidente sole orietur ex adverso, ita ut pariter aspiciantur; tunc erit plenilunium, Plin. 18, 32, 75, § 323; in plur., id. 9, 15, 20, § 53.

plēnĭlūnĭum, ĭī, n. (plenus, luna), pleine lune : Col. Rust. 11, 2, 85 ; Plin. 7, 45.