Definify.com
Webster 1913 Edition
Symmetry
Sym′me-try
,Noun.
1.
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.
2.
(Biol.)
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.
☞ Bilateral symmetry, or two-sidedness, in vertebrates, etc., is that in which the body can be divided into symmetrical halves by a vertical plane passing through the middle; radial symmetry, as in echinoderms, is that in which the individual parts are arranged symmetrically around a central axis; serial symmetry, or zonal symmetry, as in earthworms, is that in which the segments or metameres of the body are disposed in a zonal manner one after the other in a longitudinal axis. This last is sometimes called metamerism.
3.
(Bot.)
(a)
Equality in the number of parts of the successive circles in a flower.
(b)
Likeness in the form and size of floral organs of the same kind; regularity.
Axis of symmetry
. (Geom.)
See under
– Axis
. Respective symmetry
, that disposition of parts in which only the opposite sides are equal to each other.
Webster 1828 Edition
Symmetry
SYM'METRY
,Noun.
Uniform symmetry, in architecture, is where the same ordonnance reigns throughout the whole.
symmetry, is where only the opposite sides are equal to each other.