The Collaborative International Dictionary
Galleass \Gal"le*ass\ (?; 135), n. [F. gal['e]asse, gal['e]ace; cf. It. galeazza, Sp. galeaza; LL. galea a galley. See Galley.] (Naut.) A large galley, having some features of the galleon, as broadside guns; esp., such a vessel used by the southern nations of Europe in the 16th and 17th centuries. See Galleon, and Galley. [Written variously galeas, gallias, etc.]
Note: ``The galleasses . . . were a third larger than the
ordinary galley, and rowed each by three hundred galley
slaves. They consisted of an enormous towering
structure at the stern, a castellated structure almost
equally massive in front, with seats for the rowers
amidships.''
--Motley.
Usage examples of "gallias".
A Latin poem, de prima expeditione Attilae, Regis Hunnorum, in Gallias, was published in the year 1780, by Fischer at Leipsic.