| 单词 | permutation |
| 释义 | permutation —permutational, adj. —permutationist, n. /perr'myoo tay"sheuhn/, n. 1. the act of permuting or permutating; alteration; transformation. 2. Math. a. the act of changing the order of elements arranged in a particular order, as abc into acb, bac, etc., or of arranging a number of elements in groups made up of equal numbers of the elements in different orders, as a and b in ab and ba; a one-to-one transformation of a set with a finite number of elements. b. any of the resulting arrangements or groups. Cf. combination (def. 8b). [1325-75; ME permutacioun ( < MF permutacion) < L permutation- (s. of permutatio) thoroughgoing change. See PER-, MUTATION, PERMUTE] Syn. 1. modification, transmutation, change. |
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