Gradus

·noun A dictionary of prosody, designed as an aid in writing Greek or Latin poetry.

gradus
grădus, ūs (archaic gen. sing. graduis, Varr. ap. Non. 494, 17; dat. gradu, Lucil. ap. Fest. s. v. r...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
gradus
gradus ūs, m GRAD-, a step, pace, gait, walk : gradum facere: Suspenso gradu ire, T.: quieto et pl...

An Elementary Latin Dictionary