TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 DEF

(suffix) Multiplied by ...  2, record 1, English, - %2Dfold

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A twelvefold increase ... threefold aspect of a problem ...  2, record 1, English, - %2Dfold

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symmetry: In general, a figure or expression is said to be symmetric if parts of it may be interchanged without changing the whole. ... A right circular cone has an axis of symmetry. A geometric figure has n-fold rotational symmetry about an axis if a rotation of 360°/n is a symmetry of the figure. Thus an axis of symmetry can be a rotational axis. For example, an axis through the centre of a square perpendicular to the plane is a 4-fold axis since a rotation of 360°/4 produces an identical figure; a diagonal is a 2-fold axis.  3, record 1, English, - %2Dfold

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The cube shows rotational symmetry with respect to 3 axes, 2-fold with respect to the center of an edge, 3-fold with respect to a vertex, 4-fold with respect to a face.  4, record 1, English, - %2Dfold

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 CONT

Système cubique : axes de rotation d'ordre 4 [...]; axes de rotation d'ordre 3 [...]; axes de rotation d'ordre 2 [...]  2, record 1, French, - d%27ordre

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D. Schechtman et ses collaborateurs [...] ont obtenu un diagramme de diffraction icosaédrique présentant une symétrie d'ordre cinq. Qu'y a-t-il de si surprenant? Tout simplement, on sait depuis le XVIIIe siècle que la symétrie pentagonale - tout comme les symétries d'ordre égal ou supérieur à 7 - est interdite dans la structure tripériodique des cristaux.  3, record 1, French, - d%27ordre

Record 1,  Textual support,  Spanish