- pertaining to or characterizing the organization of an army division into five groups, each with supporting units, geared to maneuver in keeping with the requirements of atomic warfare.
Origin of pentomic
1955–60; pent- + (at)omic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- denoting or relating to the subdivision of an army division into five battle groups, esp for nuclear warfare
C20: from penta- + atomic