muscōsus, a, um, adj. [muscus],
full of moss, mossy : prata, Varr. R. R. 1, 9, 5: fontes, Verg. E. 7, 45.— Comp. : nihil alsius, nihil muscosius, Cic. Q. Fr. 3, 1, 2, § 5.—Hence, adv.: muscōsē , mossily , Sid. Carm. 2.
mūscōsus adj.with comp.muscus, full of moss, mossy : fontes, V.: nihil muscosius. ...
An Elementary Latin Dictionary