Quick Definition
ἄτομος, ον Adj an indivisible part of time, a moment
Strong's Definition
from 1 (as a negative particle) and the base of 5114; uncut, i.e. (by implication) indivisible (an "atom" of time)
KJV Usage: moment
UBS Dictionary of the Greek New Testament
adjc. | -ον | ἀ- + τομός
67.149 · Time · Indefinite Units of Time: Age, Lifetime, Interval, Period
moment, flash, instant an extremely short unit of time
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Mounce Concise Greek Dictionary
ἄτομος atomos 1x
indivisible, and by impl. exceedingly minute; ἐν ἀτόμῳ, i.e. χρόνῳ, in an indivisible point of time, in an instant or moment, 1 Cor. 15:52*
Abbott-Smith Greek Lexicon
** ἄ-τομος, -ον
(< τέμνω), [in Sm.: Is 54:8 (MM, s.v.)*;]
indivisible; of time, ἄτομον, a moment: ἐν ἄ., I Co 15:52.†
Liddell-Scott-Jones — Greek-English Lexicon
ἄτομος (atomos) — instant. ἄτομος, ον, uncut, unmown, λειμών[Refs 5th c.BC+]in lumps, [Refs 1st c.AD+]; ἄτομον, τό, ={ὑοσκύαμος}, uncertain in Ps.-[Refs 1st c.AD+]
2. Grammars, of words, not compound, [Refs 1st c.BC+]
II. that cannot be cut, indivisible, γραμμαί[Refs 4th c.BC+]; especially of particles of matter, ἐτεῇ ἄτομα (i.e. σώματα) καὶ κενόν[Refs 4th c.BC+]
II.2. of Time, οὐχ οἷόν τε εἰς ἀ. χρόνους διαιρεῖσθαι τὸν χρόνον[Refs 4th c.BC+]; ἐν ἀτόμῳ in a moment, [NT+2nd c.AD+]
II.2. b metaphorically, infinitely small, διαφοραί[Refs 1st c.AD+]
III. in Logic, individual, of terms, [Refs 5th c.BC+]; of the εἶδος, [Refs 4th c.BC+]
III.2. individual, [Refs]substantive ἄτομον, τό,[Refs 3rd c.AD+]
III.3. of the summum genus, πρὶν εἰς τὰ ἄ. ἐλθεῖν[Refs 4th c.BC+]. adverb ἀτόμως, ὑπάρχειν immediately, without the intervention of a middle term, [Refs]