GRC
Bailly
ὕπ·ομϐρος, ος, ον :
1 quelque peu pluvieux ou humide, PLUT. Cam. 3, M. 438 a ; GEOP. 1, 12, 21 ;
2 humide en dessous, GAL. Lex. Hipp. 19, 149.
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LSJ
ον, 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. 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. 2.438a.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)
Pape
mit Regen untermischt, durchnäßt, Hippocr., θέρος, regniger Sommer, Plut. Cam. 3, νεφέλη, Regenwolke ; ὕπομβρον γενόμενον καὶ κατακλυσθέν def. Or. 51.
Pape, Griechisch-deutsches Handwörterbuch (3. Aufl., 1914)