Strong's #823: atomos (pronounced at'-om-os)
from 1 (as a negative particle) and the base of 5114; uncut, i.e. (by implication) indivisible (an "atom" of time):-- moment.
Thayer's Greek Lexicon:
̓́
atomos
1) that cannot be cut in two, or divided, indivisible
1a) of a moment of time
Part of Speech: adjective
Relation: from G1 (as a negative particle) and the base of G5114
Usage:
This word is used 1 times:
1 Corinthians 15:52: "In a moment, in the twinkling of an eye, at the last"