Lacking symmetry or balance; not symmetrical in form, arrangement, or proportion.
From dis- (opposite/lack of) + symmetric (from Greek syn- 'with' + metron 'measure'). The term emerged in scientific and mathematical contexts to describe asymmetrical structures.
Dissymmetry is actually crucial in biology—your left and right hands are dissymmetric (mirror images but not identical), and this asymmetry is essential to life because it affects how molecules interact with enzymes.
Complete word intelligence in one call. Free tier — 50 lookups/day.