| 单词 |
anallagmatic |
| 释义 |
anallagmatic, a. Math.|ˌænælægˈmætɪk| [f. Gr. ἀν not + ἄλλαγµα(τ-) something given in exchange, lit. a change (f. ἀλλάττ-ειν to change) + -ic.] Not changed in form by ‘inversion’: applied to the surfaces of certain solids, as the sphere.
1869Clifford Brit. Assoc. Rep. 8 On the Umbilici of Anallagmatic Surfaces. 1874Salmon Geom. Three Dimens. §516 A surface which is its own inverse with regard to any point has been called an anallagmatic surface. |

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