Strong's G823 · Greek

ἄτομος

atomos · at'-om-os

from 1 (as a negative particle) and the base of 5114; uncut, i.e. (by implication) indivisible (an "atom" of time)

Scholarly Lexicons

Abbott-Smith Manual Greek Lexicon

 1 ** ἄ-τομος , -ον ( τέμνω ), [in Sm.: Is 54:8 (MM, s.v.)*;] indivisible ; of time, ἄτομον , a moment : ἐν ἄ. , I Co 15:52 .† 

G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain