cĕleusma (also cĕleuma), ătis, n. (cĕleusma, ae, f., Ven. Vita S. Mart. 4, 423), = κέλευσμα κέλευμα),
a command or call given by the chief oarsman , which gave the time to the rowers , Mart. 3, 67, 4; Rutil. 1, 370; cf. Ascon. Cic. Div. in Caecil. 17, 55.