2. underground, “ὑ. τάφροι” sewers, App.BC4.13; “ὀρύγματα” J.AJ7.9.6; “ὑ. ἄντρον” Str.13.1.67; ὑ. τὴν ἀποφορὰν ἔχει, of a lake, Id.12.8.19 (s. v. l.).
3. ὑ. ἕλκος a spreading ulcer with undermined edges, Dsc. 5.120; “κόλποι ὑ.” Id.1.128, cf. Heras ap.Gal.13.815.
II. ὑπόνομος, ὁ, as Subst., underground passage, mine, Th.2.76; “οὐκέτι ὑπονόμοις, ἀλλ᾽ ἤδη μηχαναῖς αἱρεῖν τὴν πολιτείαν” Plu.Caes.6.
3. sewer, Str.5.3.8, App.BC4.40.
4. vein of minerals, X.Vect.4.26.