Lexical Definition

‎καταχθόνιος‎ katachthónios (kat-akh-thon'-ee-os) subterranean G:A
from ‎κατά‎ and (the ground)

under the earth.

Usage: 1 form in 1 verse
Form Translated As     In Verse(s)
καταχθονίων under the earth Phil.2.10

Abbott-Smith

* κατα-χθόνιος, -ον (< χθών, the earth),
subterranean, under the earth (in cl., of the infernal gods): of the departed in Hades, opp. to ἐπουράνιος, ἐπίγειος, Phl 2:10.†

Abbott-Smith References

Book Refs
Philippians 2:10

Liddell-Scott-Jones

καταχθόνιος-ιος, ον,

also η, ον [Refs 3rd c.BC+]:— subterranean, Ζεὺς καταχθόνιοςιος, i.e. Pluto, [Refs 8th c.BC+]; of Pluto, Demeter, Persephone, and the Erinyes, [Refs 4th c.AD+] M.; = Latin Di Manes, [Refs]; κ.θεοί, = Latin Di Manes, frequently in sepulchral Inscrr., [Refs]