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Pronunciation:  i'kwivulunt

WordNet Dictionary
  1. [n]  the atomic weight of an element that has the same combining capacity as a given weight of another element; the standard is 8 for oxygen
  2. [n]  a person or thing equal to another in value or measure or force or effect or significance etc; "send two dollars or the equivalent in stamps"
  3. [adj]  essentially equal; "women are paid less than men doing equivalent work"
  4. [adj]  equal in amount or value; "like amounts"; "equivalent amounts"; "the same amount"; "gave one six blows and the other a like number"; "an equal number"; "the same number"

EQUIVALENT is a 10 letter word that starts with E.


 Synonyms: combining weight, eq, equal, equivalent weight, like, same
 Antonyms: unequal, unlike
 See Also: atomic weight, cognition, counterpart, knowledge, noesis, opposite number, relative atomic mass, replacement, substitute, vis-a-vis



Webster's 1913 Dictionary
  1. \E*quiv"a*lent\, a. [L. aequivalens, -entis, p. pr.
    of aequivalere to have equal power; aequus equal + valere to
    be strong, be worth: cf. F. ['e]quivalent. See {Equal}, and
    1. Equal in wortir or value, force, power, effect, import,
       and the like; alike in significance and value; of the same
       import or meaning.
             For now to serve and to minister, servile and
             ministerial, are terms equivalent.    --South.
    2. (Geom.) Equal in measure but not admitting of
       superposition; -- applied to magnitudes; as, a square may
       be equivalent to a triangle.
    3. (Geol.) Contemporaneous in origin; as, the equivalent
       strata of different countries.
  2. \E*quiv"a*lent\, n.
    1. Something equivalent; that which is equal in value, worth,
       weight, or force; as, to offer an equivalent for damage
             He owned that, if the Test Act were repealed, the
             Protestants were entitled to some equivalent. . . .
             During some weeks the word equivalent, then lately
             imported from France, was in the mouths of all the
             coffeehouse.                          --Macaulay.
    2. (Chem.) That comparative quantity by weight of an element
       which possesses the same chemical value as other elements,
       as determined by actual experiment and reference to the
       same standard. Specifically:
       (a) The comparative proportions by which one element
           replaces another in any particular compound; thus, as
           zinc replaces hydrogen in hydrochloric acid, their
           equivalents are 32.5 and 1.
       (b) The combining proportion by weight of a substance, or
           the number expressing this proportion, in any
           particular compound; as, the equivalents of hydrogen
           and oxygen in water are respectively 1 and 8, and in
           hydric dioxide 1 and 16.
    Note: This term was adopted by Wollaston to avoid using the
          conjectural expression atomic weight, with which,
          however, for a time it was practically synonymous. The
          attempt to limit the term to the meaning of a
          universally comparative combining weight failed,
          because of the possibility of several compounds of the
          substances by reason of the variation in combining
          power which most elements exhibit. The equivalent was
          really identical with, or a multiple of submultiple of,
          the atomic weight.
    3. (Chem.) A combining unit, whether an atom, a radical, or a
       molecule; as, in acid salt two or more equivalents of acid
       unite with one or more equivalents of base.
    {Mechanical equivalent of heat} (Physics), the number of
       units of work which the unit of heat can perform; the
       mechanical energy which must be expended to raise the
       temperature of a unit weight of water from 0[deg] C. to
       1[deg] C., or from 32[deg] F. to 33[deg] F. The term was
       introduced by Dr. Mayer of Heilbronn. Its value was found
       by Joule to be 1390 foot pounds upon the Centigrade, or
       772 foot pounds upon the Fahrenheit, thermometric scale,
       whence it is often called {Joule's equivalent}, and
       represented by the symbol J. This is equal to 424 kilogram
       meters (Centigrade scale). A more recent determination by
       Professor Rowland gives the value 426.9 kilogram meters,
       for the latitude of Baltimore.
  3. \E*quiv"a*lent\, v. t.
    To make the equivalent to; to equal; equivalence. [R.]
Thesaurus Terms
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