| 释义 |
equivalence
e·quiv·a·lence E0192300 (ĭ-kwĭv′ə-ləns)n.1. The state or condition of being equivalent; equality.2. Mathematics An equivalence relation.3. Logic The relationship that holds for two propositions that are either both true or both false, so that the affirmation of one and the denial of the other results in contradiction.equivalence (ɪˈkwɪvələns) or equivalencyn1. the state of being equivalent or interchangeable2. (Logic) maths logic a. the relationship between two statements, each of which implies the otherb. 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 ∨ –qe•quiv•a•lence (ɪˈkwɪv ə ləns or, for 3, ˌi kwəˈveɪ ləns)
n. 1. the state or fact of being equivalent; equality in value, force, significance, etc. 2. an instance of this; an equivalent. 3. the state of having equal chemical valence. 4. Logic. a. the relation between two propositions such that they are either both true or both false. b. the relation between two propositions such that each logically implies the other. adj. 5. (of a logical or mathematical relationship) reflexive, symmetrical, and transitive. [1535–45; < Middle French < Medieval Latin] Equivalence neck and neck Even, equal, on a par; abreast, at the same pace. Based on available citations, figurative use of this expression is as old as the literal horse-racing one, both dating from the early 19th century. It still finds frequent application. Production ran neck and neck in the studios, but the second version … reached the public screen last. (The Times, June, 1955) nip and tuck So close as to be of uncertain outcome; neck and neck, on a par, even; up in the air, questionable. This chiefly U.S. term is of puzzling origin and inconsistent form, appearing in print in the 1800s as rip and tuck, nip and tack, and nip and chuck, before assuming its present nip and tuck. Its original restriction to contexts describing close contests, usually athletic, lends credence to the claim that it originated as a wrestling term (Barrère and Leland, Dictionary of Slang, 1890). The expression is now employed in much broader contexts, indicative of any kind of uncertainty. It is nip and tuck whether such a last great achievement of the bipartisan foreign policy can be ratified before … the Presidential race. (The Economist, May, 1948) Thesaurus| Noun | 1. | equivalence - a state of being essentially equal or equivalent; equally balanced; "on a par with the best"equality, equation, parstatus, position - the relative position or standing of things or especially persons in a society; "he had the status of a minor"; "the novel attained the status of a classic"; "atheists do not enjoy a favorable position in American life"egalite, egality - social and political equality; "egality represents an extreme leveling of society"tie - equality of score in a contest | | 2. | equivalence - essential equality and interchangeabilityequality - the quality of being the same in quantity or measure or value or statusparity - functional equalitynonequivalence - not interchangeable | | 3. |  equivalence - qualities that are comparable; "no comparison between the two books"; "beyond compare"comparability, compare, comparisonalikeness, likeness, similitude - similarity in appearance or character or nature between persons or things; "man created God in his own likeness" |
equivalencenoun equality, correspondence, agreement, similarity, identity, parallel, match, parity, conformity, likeness, sameness, parallelism, evenness, synonymy, alikeness, interchangeableness the equivalence of science and rationalismequivalencenounThe state of being equivalent:equality, equation, equivalency, par, parity, sameness.Translationsequivalence
equivalence[i′kwiv·ə·ləns] (mapping) In an equal-area map projection, the property of having the ratio between areas on the map the same as the ratio between corresponding areas on the earth's surface. (mathematics) A logic operator having the property that if P, Q, R, etc., are statements, then the equivalence of P, Q, R, etc., is true if and only if all statements are true or all statements are false. equivalence
e·quiv·a·lence , equivalency (ē-kwiv'ă-lens, -len-sē), 1. The property of an element or radical of combining with or displacing, in definite and fixed proportion, another element or radical in a compound. 2. The point in a precipitin test at which antibody and antigen are present in optimal proportions. [L. aequus, equal, + valentia, strength (valence)] e·quiv·a·lence , equivalency (ē-kwiv'ă-lĕns, -lĕn-sē) The property of an element or radical of combining with or displacing, in definite and fixed proportion, another element or radical in a compound. [L. aequus, equal, + valentia, strength (valence)]equivalence (ē-kwĭv′ă-lĕns) [″ + valere, to be worth] The quality of being equal in power, potency, force, value, or clinical effectiveness.equivalence Related to equivalence: Equivalence principle, equivalence relation, Equivalence class
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equivalence
Related to equivalence: Equivalence principle, equivalence relation, Equivalence classSynonyms for equivalencenoun equalitySynonyms- equality
- correspondence
- agreement
- similarity
- identity
- parallel
- match
- parity
- conformity
- likeness
- sameness
- parallelism
- evenness
- synonymy
- alikeness
- interchangeableness
Synonyms for equivalencenoun the state of being equivalentSynonyms- equality
- equation
- equivalency
- par
- parity
- sameness
Synonyms for equivalencenoun a state of being essentially equal or equivalentSynonymsRelated Words- status
- position
- egalite
- egality
- tie
noun essential equality and interchangeabilityRelated WordsAntonymsnoun qualities that are comparableSynonyms- comparability
- compare
- comparison
Related Words- alikeness
- likeness
- similitude
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