| 释义 |
WordReference Random House Unabridged Dictionary of American English © 2024du•al•i•ty (do̅o̅ al′i tē, dyo̅o̅-),USA pronunciation n. - a dual state or quality.
- Mathematicsa symmetry within a mathematical system such that a theorem remains valid if certain objects, relations, or operations are interchanged, as the interchange of points and lines in a plane in projective geometry.
- Late Latin duālitās. See dual, -ity
- Middle English dualitie 1350–1400
WordReference Random House Learner's Dictionary of American English © 2024du•al /ˈduəl, ˈdyu-/USA pronunciation adj. [before a noun]- of, relating to, or meaning two; made up of two people, items, parts, etc., together:dual ownership.
du•al•ism, n. [uncountable]the dualism of good and evil. du•al•i•ty /duˈælɪti, dyu-/USA pronunciation n. [uncountable]See -du-. WordReference Random House Unabridged Dictionary of American English © 2024du•al (do̅o̅′əl, dyo̅o̅′-),USA pronunciation adj. - of, pertaining to, or noting two.
- composed or consisting of two people, items, parts, etc., together;
twofold;
double:dual ownership; dual controls on a plane. - having a twofold, or double, character or nature.
- Grammarbeing or pertaining to a member of the category of number, as in Old English, Old Russian, or Arabic, that denotes two of the things in question.
n. [Gram.] - Grammarthe dual number.
- Grammara form in the dual, as Old English git "you two,'' as contrasted with ge "you'' referring to three or more.
- Latin duālis containing two, relating to a pair, equivalent. to du(o) two + -ālis -al1
- 1535–45
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