You will find in the middle L & S: ATOMOS [ hence our 'atom' ]
a)/tomoj atomojte/mnw I. uncut, unmown, Soph. II. that cannot be cut,
indivisible, Plat.;
There is also:
AKARHS = too short to be cut
Maurice A. O'Sullivan [ Bray, Ireland ]
mauros@iol.ie
[using Eudora Pro v 2.2 ]