rōrātĭo, ōnis, f. [roro], a falling of dew, dew.
I Lit., Vitr. 8, 2, 2.—In plur.: nocturnae, Ap. Met. 9, 32, 12.—
II Transf.
A The falling off of the grape in consequence of a cold dew ( a disease of the grapes ), Plin. 17, 24, 37, § 226.—
B A dropping in the clepsydra , Cassiod. Var. 1, 48.