1. of or relating to a military organization or system based on five-man units or five-company formations
Usage: military; historical; chiefly U.S.
2. of or relating to pentominoes, geometric shapes composed of five unit squares
Usage: mathematics; recreational

Examples

• The pentomic division structure was adopted by the U.S. Army in the 1950s.
• Pentomic units were designed to be more flexible in nuclear warfare scenarios.
• Children enjoy solving pentomic puzzles that require arranging five-square pieces.
• The pentomic system was eventually replaced by a different organizational model.
• Pentomic shapes appear frequently in recreational mathematics and puzzle games.