hydraulicus
From LSJ
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)
hydraulĭcus: a, um, adj., = ὑδραυλικός,
I of or belonging to the water-organ, hydraulic: machinae, water-organs, Vitr. 9, 9; 10, 13; called also organa, Plin. 7, 37, 38, § 125; Suet. Ner. 41.
