“CELEUS'MA (Ant.) ..., a shout of encouragement, which mariners make to one another whilst they are engaged in any work, similar to “Ho up,” and such like words, used among sailors in modern times.
Mart. 1.4, ep.64, v.21.

Quem nec rumpere nauticum celeusma.

Serv. in Æn.1. 8; Gloss. Cyrill.; Gyrald. de Navig. c.16; Bud. in Pandect. p. 106; Scheff. de Mil. Nav. l.3, c.1.

CELE'USTES (Ant.) he who shouted the celeusma to the mariners. [vide Celeusma]”
[Universal Technological Dictionary, Vol.1, Crabb, 1833]