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Толковый словарь английского языка - symmetry

 

Symmetry

symmetry
noun (plural -tries) see: measure Date: 1563 balanced proportions, the property of being symmetrical, a rigid motion of a geometric figure that determines a one-to-one mapping onto itself, the property of remaining invariant under certain changes (as of orientation in space, of the sign of the electric charge, of parity, or of the direction of time flow)
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1.
  n. (pl. -ies) 1 a correct proportion of the parts of a thing; balance, harmony. b beauty resulting from this. 2 a a structure that allows an object to be divided into parts of an equal shape and size and similar position to the point or line or plane of division. b the possession of such a structure. c approximation to such a structure. 3 the repetition of exactly similar parts facing each other or a centre. 4 Bot. the possession by a flower of sepals and petals and stamens and pistils in the same number or multiples of the same number. Derivatives symmetric adj. symmetrical adj. symmetrically adv. symmetrize v.tr. (also -ise). Etymology: obs. F symm{eacute}trie or L summetria f. Gk (as SYN-, metron measure) ...
Толковый словарь английского языка Oxford English Reference

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