An example of symmetry is a circle that is the same on both sides if you fold it along its diameter.
- similarity of form or arrangement on either side of a dividing line or plane; correspondence of opposite parts in size, shape, and position; condition of being symmetrical: the whole or the corresponding parts are said to have symmetry
- balance or beauty of form or proportion resulting from such correspondence
Origin of symmetry; from Middle French or L: Middle French symmetrie (now symétrie) ; from Classical Latin symmetria ; from Classical Greek ; from symmetros, measured together ; from syn-, together + metron, a measure
- The correspondence of the form and arrangement of elements or parts on opposite sides of a dividing line or plane or about a center or an axis: the symmetry of a butterfly's wings.
- A relationship in which there is correspondence or similarity between entities or parts: the symmetry of the play, which opens and ends with a speech by a female character.
- Beauty as a result of pleasing proportions or harmonious arrangement: “Here were the ringlets, framing a face of exquisite symmetry” (Clive Barker).
- Physics Invariance under transformation. For example, a system that is invariant under rotation has rotational symmetry.
Origin of symmetryLatin symmetria, from Greek summetriā, from summetros, of like measure : sun-, syn- + metron, measure; see mē-2 in Indo-European roots.
top: bilateral symmetry
bottom: radial symmetry
See also form.asymmetry the quality or condition of lacking symmetry. — asymmetrical, asymmetric, adj. bisymmetry Botany. the condition of having two planes of symmetry at right angles to one another. —bisymmetric, bisymmetrical, adj. monosymmetry 1. the state exhibited by a crystal, having three unequal axes with one oblique intersection; the state of being monoclinic. See also biology. 2. Biology. the state of being zygomorphic, or bilaterally symmetric, or divisible into symmetrical halves by one plane only. See also zygomorphism. See also PHYSICS. —monosymmetric, monosymmetrical, adj. symmetromania a mania for symmetry. symmetrophobia an abnormal fear or dislike of symmetry.
From Latin symmetria, from Ancient Greek ÏƒÏ…Î¼Î¼ÎµÏ„ÏÎ¯Î± (symmetria), from ÏƒÏÎ¼Î¼ÎµÏ„ÏÎ¿Ï‚ (summetros, “symmetrical"), from ÏƒÏÎ½ (sun, “with") + Î¼ÎÏ„ÏÎ¿Î½ (metron, “measure").