ὕπ-ομβρος · hyp-ombros — LSJ
mixed with rain, rainy, impregnated
mixed with rain, θέρος ὕ. a rainy summer, Plu. Cam. 3 (as v.l. for ἔπομβρον) ; ἔαρ Gp. 1.12.21; νύξ EM 450.49; γῆ Philostr. Im. 1.9, cf. Ph. Bel. 82.28, 97.27; impregnated, ἀσφάλτῳ Philostr. VA 1.24.
II drenched
ὕπομβρον ὀστέον Hp. ap. Erot., who explains it as ὑπόνομον καὶ κάθυγρον γεγονός, and ap. Gal. 19.149, who says ὕφυγρον, ὑπόπυον, where the reference is to Hp. VC 15; μόλις ὕπομβρον γενόμενον καὶ κατακλυσθὲν τὸ ἱερεῖον apparently drenched, as t.t. in divination, Plu. Def.orac. 2.438a.