| 释义 |
WordReference Random House Learner's Dictionary of American English © 2024e•qui•val•ence /ɪˈkwɪvələns/USA pronunciation n. - the act or condition of being the same or equal in value, measure, force: [uncountable]demanding equivalence in treatment.[countable]An equivalence was found between the two chemical reactions.
WordReference Random House Unabridged Dictionary of American English © 2024e•quiv•a•lence (i kwiv′ə ləns or, for 3, ē′kwə vā′ləns),USA pronunciation n. - the state or fact of being equivalent;
equality in value, force, significance, etc. - an instance of this;
an equivalent. - Chemistrythe quality of having equal valence.
- Philosophy, Mathematics[Logic, Math.]
- Also called material implication. the relation between two propositions such that the second is not false when the first is true.
- Also called material equivalence. the relation between two propositions such that they are either both true or both false.
- the relation between two propositions such that each logically implies the other.
adj. - Mathematics, Philosophy(of a logical or mathematical relationship) reflexive, symmetrical, and transitive.
Also, equivalency (for defs. 1, 2). - Medieval Latin aequivalentia, equivalent. to Latin aequivalent- equivalent + -ia -ia; see -ence
- Middle French
- 1535–45
Collins Concise English Dictionary © HarperCollins Publishers:: equivalence /ɪˈkwɪvələns/, equivalency n - the state of being equivalent or interchangeable
- the relationship between two statements, each of which implies the other
- Also called: biconditional the binary truth-function that takes the value true when both component sentences are true or when both are false, corresponding to English if and only if. Symbol: ≡ or ↔, as in –(p ∧ q) ≡ –p ∨ –q
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