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adjective
1.
characterized by or exhibiting symmetry; well-proportioned, as a body or whole; regular in form or arrangement of corresponding parts.
2.
Geometry.
a.
noting two points in a plane such that the line segment joining the points is bisected by an axis: Points (1, 1) and (1, −1) are symmetrical with respect to the x-axis.
b.
noting a set consisting of pairs of points having this relation with respect to the same axis.
c.
noting two points in a plane such that the line segment joining the points is bisected by a point or center: The points (1, 1) and (−1, −1) are symmetrical with respect to (0, 0).
d.
noting a set consisting of pairs of points having this relation with respect to the same center.
3.
Often, symmetric. Mathematics.
a.
noting a square matrix that is equal to its transpose.
b.
noting a dyad or dyadic that is equal to its conjugate.
c.
noting a relation in which one element in relation to a second implies the second in relation to the first.
4.
Botany.
a.
divisible into two similar parts by more than one plane passing through the center; actinomorphic.
b.
(of a flower) having the same number of parts in each whorl.
5.
EXPANDChemistry.
a.
having a structure that exhibits a regular repeated pattern of the component parts.
b.
noting a benzene derivative in which three substitutions have occurred at alternate carbon atoms.
6.
COLLAPSEaffecting corresponding parts simultaneously, as certain diseases.
Also, sym·met·ric.
Related forms
sym·met·ri·cal·ly, adverb
sym·met·ri·cal·ness, noun
non·sym·met·ri·cal, adjective
un·sym·met·ri·cal, adjective
un·sym·met·ri·cal·ly, adverb
Synonyms
1. balanced, orderly, regular, congruent.
1. balanced, orderly, regular, congruent.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Symmetric
is always a great word to know.
So is flibbertigibbet. Does it mean:
| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
| a chattering or flighty, light-headed person. |
Collins
World English Dictionary
| symmetric (sɪˈmɛtrɪk) | |
| —adj | |
| 1. | logic, maths asymmetric antisymmetric Compare nonsymmetric (of a relation) holding between a pair of arguments x and y when and only when it holds between y and x, as … is a sibling of … but not … is a brother of … |
| 2. | another word for symmetrical |
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Science Dictionary
symmetric (sĭ-mět'rĭk) or symmetrical  (sĭ-mět'rĭk) Pronunciation Key
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The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
FOLDOC
Computing Dictionary
symmetric definition
mathematics1. A relation R is symmetric if, for all x and y,
x R y => y R x
If it is also antisymmetric (x R y & y R x => x == y) then x R y => x == y, i.e. no two different elements are related.
2. In linear algebra, a member of the tensor product of a vector space with itself one or more times, is symmetric if it is a fixed point of all of the linear isomorphisms of the tensor product generated by permutations of the ordering of the copies of the vector space as factors. It is said to be antisymmetric precisely if the action of any of these linear maps, on the given tensor, is equivalent to multiplication by the sign of the permutation in question.
(1996-09-22)
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