Lexical Definition

‎ἄτεκνος‎ áteknos (at'-ek-nos) childless G:A
from ‎Α‎ (as a negative particle) and ‎τέκνον‎

childless, without children.

Usage: 3 forms in 8 verses
Form Translated As     In Verse(s)
ἄτεκνοσ childless Luke.20.28Luke.20.29Luke.20.30
άτεκνοσ childless LXX.Gen.15.2LXX.Isa.49.21
άτεκνοι childless LXX.Lev.20.20LXX.Lev.20.21LXX.Jer.18.21

Abbott-Smith

ἄτεκνος, -ον (< τέκνον), [in LXX: Ge 15:2, Le 20:20, 21 (עֲרִירִי), Is 49:21, Je 18:21 (שׁכל), Si 16:3*;]
childless: Lk 20:28, 29.†

Abbott-Smith References

Book Refs
Genesis 15:2
Leviticus 20:20 · 20:21
Isaiah 49:21
Jeremiah 18:21
Luke 20:28 · 20:29

Liddell-Scott-Jones

ἄτεκνος-ος, ον,

without children, childless, barren, [Refs 8th c.BC+]; of animals and fishes, [Refs 5th c.BC+]adverb -νως[Refs 5th c.BC+]

__II in causal sense, λειχὴν ἄφυλλος .[Refs 5th c.BC+]