Dictionary.net

(physics) the property of being isotropic; having the same value when measured in different directions

(mathematics) an attribute of a shape or relation; exact correspondence of form on opposite sides of a dividing line or plane

A due proportion of the several parts of a body to each other; adaptation of the form or dimensions of the several parts of a thing to each other; the union and conformity of the members of a work to the whole.

The law of likeness; similarity of structure; regularity in form and arrangement; orderly and similar distribution of parts, such that an animal may be divided into parts which are structurally symmetrical.

Equality in the number of parts of the successive circles in a flower.

Likeness in the form and size of floral organs of the same kind; regularity.

Harmony, balance, or right proportion of the several parts of a body; similarity of parts on two sides of a dividing line.

Due proportion of parts to each other or the whole.

Symmetric, symmetrical.

Due correspondence of parts or elements; harmony.

State of divisibility into similar halves; regularity of form; similarity of structure on each side of an axis, central, dorsoventral, or antero-posterior. See bilateral and radial symmetry.

The condition of being symmetrical.

n. [Latin, Greek] A due proportion of the several parts of a body to each other, or the union and conformity of the members of a work to the whole; .-due proportion ; harmony ; beauty of form.