ūmĭdŭlus, a, um, adj. dim. [umidus],
rather damp , dampish , wettish (poet. and very rare), Ov. A. A. 3, 629: comae, Aus. Ep. 106.
ūmidulus adj. dim. umidus, rather damp, moist : linum, O. ...
An Elementary Latin Dictionary