ὑπόγειος,
also ὑπόγαιος, ον, (γῆ) underground, subterraneous, οἴκημα ὑπόγαιον [[ 5th c.BC: Herodotus Historicus 2.100, 148 (variants -γεον, -γεα) ὀρύγματα ὑπόγαια ] Refs 5th c.BC+]mines, [[ [prev. author] 4.200 (variant{-γεα})] Refs]; ὑπογαίου (variant{-γείου}) βροντῆς [[ 4th-5th c.BC: Aeschylus Tragicus “Fragmenta - American Journal of Philology” 57.10 (_anapaest meter_); ὑπόγειον ὕδωρ “Geoponica” 2.6.33; ὑ. οἶνος ] Refs 4th c.BC+]stored in a cellar, [[ 2nd c.AD: Galenus Medicus 19.95. ] Refs 2nd c.AD+]
__II ὑπόγειον or -γαιον, τό, an underground chamber, [[ 1st-2nd c.AD: Plutarchus Biographus et Philosophus 2.770e, 2nd c.AD: Herodianus Grammaticus 1.15.6. ] Refs 1st c.AD+]
__III Astron., under the earth, [[ 4th c.AD(?): Manetho Astrologus 3.27, “Geoponica” 1.7.1; [ἄστρα] τὴν ὑ. φορὰν ἐνεχθέντα “Placita Philosophorum” 1.6.8: τὸ ὑ. ] Refs 4th c.AD+]the nadir, [[ 2nd c.AD: Vettius Valens Astrologus 75.24.] Refs 2nd c.AD+]—The form ὑπόγεως, ων, cited in [[ 2nd c.AD: Herodianus Grammaticus “Epim.” 208 and 10th c.AD: Suidas Legal icographus ] Refs 2nd c.AD+], occurs in codices of [[ 2nd c.AD: Pausanias Periegeta 2.2.1, 2.36.7 ] Refs 2nd c.AD+]; compare ὑπογάιδιον.