Strong's G823 — ἄτομος (adjective)
atomos (at'-om-os) adj.
1. uncut
2. (by implication) indivisible (an "atom" of time)
[from G1 (as a negative particle) and the base of G5114]
KJV: moment 
Root(s): G1, G5114 
Hebrew root: τομώτερος
Occurrences: 1