Symmetry

n. exact correspondence between parts on either side of a central line; proportion, balance between the parts of something

Symmetry in common usage generally conveys two primary meanings. The first is an imprecise sense of harmonious or aesthetically-pleasing proportionality and balance; such that it reflects beauty or perfection. The second meaning is a precise and well-defined concept of balance or "patterned self-similarity" that can be demonstrated or proved according to the rules of a formal system: by geometry, through physics or otherwise.
See more at Wikipedia.org...

Noun
1. (mathematics) an attribute of a shape or relation; exact correspondence of form on opposite sides of a dividing line or plane
(synonym) symmetricalness, correspondence, balance
(antonym) asymmetry, imbalance
(hypernym) spatial property, spatiality
(hyponym) regularity, geometrical regularity
(derivation) symmetrize, symmetrise
(classification) mathematics, math, maths
2. balance among the parts of something
(synonym) proportion
(hypernym) balance, equilibrium, equipoise, counterbalance
(derivation) symmetrize, symmetrise
3. (physics) the property of being isotropic; having the same value when measured in different directions
(synonym) isotropy
(hypernym) property
(classification) physics, physical science, natural philosophy

(n.)
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.
  

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

(n.)
Equality in the number of parts of the successive circles in a flower.
  

(n.)
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.
  

Synonyms and related words:
accord, accordance, affinity, agreement, arrangement, array, assent, balance, beauty, chorus, coequality, coextension, coherence, coincidence, communion, community, compatibility, concert, concinnity, concord, concordance, conformance, conformation, conformity, congeniality, congruence, congruency, congruity, congruousness, consistency, consonance, consort, cooperation, corelation, correlation, correlativism, correlativity, correspondence, deployment, disposal, disposition, equality, equation, equilibrium, equipoise, equipollence, equiponderance, equity, equivalence, equivalency, euphony, evenness, finish, formation, harmony, identity, intersection, inverse proportion, inverse ratio, inverse relationship, justice, layout, levelness, likeness, lineup, marshaling, measure, measuredness, mutuality, oneness, order, orderedness, orderliness, organization, overlap, par, parallelism, parity, peace, poise, proportion, proportionality, quiet, quietude, rapport, reciprocality, reciprocation, reciprocity, regularity, relativity, rhythm, routine, self-consistency, setup, structure, sweetness, sync, synchronism, system, tally, timing, tranquillity, uniformity, union, unison, unisonance|