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equivalent    音標拼音: [ɪkw'ɪvələnt]
n. 同等物,等價物,相等物
a. 相等的,相當的,同意義的

同等物,等價物,相等物相等的,相當的,同意義的

equivalent
相等

equivalent
等效 等價 當量

equivalent
adj 1: being essentially equal to something; "it was as good as
gold"; "a wish that was equivalent to a command"; "his
statement was tantamount to an admission of guilt" [synonym:
{equivalent}, {tantamount(p)}]
n 1: 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"
2: 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 [synonym: {equivalent}, {equivalent weight},
{combining weight}, {eq}]

Equivalent \E*quiv"a*lent\ ([-e]*kw[i^]v"[.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 {Valiant}.]
1. Equal in worth or value, force, power, effect, import, and
the like; alike in significance and value; of the same
import or meaning.
[1913 Webster]

For now to serve and to minister, servile and
ministerial, are terms equivalent. --South.
[1913 Webster]

2. (Geom.) Equal in measure but not admitting of
superposition; -- applied to magnitudes; as, a square may
be equivalent to a triangle.
[1913 Webster]

3. (Geol.) Contemporaneous in origin; as, the equivalent
strata of different countries.
[1913 Webster]


Equivalent \E*quiv"a*lent\ ([-e]*kw[i^]v"[.a]*lent), n.
1. Something equivalent; that which is equal in value, worth,
weight, or force; as, to offer an equivalent for damage
done.
[1913 Webster]

He owned that, if the Test Act were repealed, the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 orators. --Macaulay.
[1913 Webster]

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.
[1913 Webster]

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.
[1913 Webster]

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.
[1913 Webster]

{Mechanical equivalent of heat} (Physics), originally defined
as the number of units of work which the unit of heat can
perform, equivalent to the mechanical energy which must be
expended to raise the temperature of a pound of water one
degree Fahrenheit; later this value was defined as one
{British thermal unit} (B.t.u). Its value was found by
Joule to be 772 foot pounds; later measurements give the
value as 777.65 foot-pounds, equivalent to 107.5
kg-meters. This value was originally called Joule's
equivalent, but the modern Joule is defined differently,
being 10^{7} ergs. The B.t.u. is now given as 1,054.35
absolute Joules, and therefore 1 calorie (the amount of
heat needed to raise one gram of water one degree
centigrade) is equivalent to 4.186 Joules.
[1913 Webster PJC]

Note: The original definition of the Mechanical equivalent of
heat in the 1913 Webster was as below. The difference
between foot pounds and kilogram-meters ("on the
centigrade scale") is puzzling as it should be a factor
of 7.23, and the figure given for kilogram-meters may
be a mistaken misinterpretation of the report. -- PJC:
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.
[1913 Webster PJC]


Equivalent \E*quiv"a*lent\, v. t.
To make the equivalent to; to equal; equivalence. [R.]
[1913 Webster]

252 Moby Thesaurus words for "equivalent":
Doppelganger, accordant, actual thing, affirmative, agent, agnate,
agreeable, agreeing, akin, alike, all one, all the same, ally,
alter ego, alternate, alternative, analogon, analogous, analogue,
analogy, answerable, answering, associate, at one, backup, balance,
ballast, brother, carbon copy, change, changeable, changeling,
close, close copy, close match, coequal, coexistent, coexisting,
coextensive, cognate, coherent, coincident, coincidental,
coinciding, commensurate, commutable, commutative, companion,
comparable, comparison, compatible, compeer, complement,
complemental, complementary, concordant, concurring, conformable,
congenator, congener, congenial, congruent, congruous,
consentaneous, consentient, consideration, consistent, consonant,
convertible, cooperating, cooperative, coordinate, copy, correlate,
correlative, correspondent, corresponding, coterminous,
counterbalance, counterfeit, counterpart, counterpoise,
counterweight, dead ringer, deputy, ditto, double, dummy,
duplicate, en rapport, equal, equalizing, equiparant, equipoise,
equipollent, ersatz, even, exact counterpart, exchange, exchanged,
facsimile, fake, fellow, fill-in, ghost, ghostwriter,
give-and-take, harmonious, homograph, homologous, homonym,
homophone, idem, identic, identical, identical same, image,
imitation, in accord, in agreement, in rapport, in sync,
in synchronization, inaccordance, indistinguishable, inharmony,
interchangeable, interchanged, kindred spirit, like, like-minded,
likeness, locum tenens, makeshift, makeweight, match, matching,
mate, metaphor, metonymy, mock, much the same, mutual,
near duplicate, next best thing, no other, none other, obverse,
of a kind, of a piece, of a size, of like mind, of one mind,
offset, on all fours, opposite number, parallel, paralleling, peer,
pendant, permutable, personnel, phony, picture, pinch,
pinch hitter, positive, proportionate, provisional, proxy,
quid pro quo, reciprocal, reciprocating, reciprocative,
reconcilable, relief, replacement, replica, representative,
reserve, reserves, retaliatory, returnable, ringer, rival,
second self, second string, secondary, self-consistent, selfsame,
setoff, sign, similar, similitude, simulacrum, sister,
something of value, soul mate, spare, spares, spit and image,
spitting image, stand-in, standard, stopgap, sub, substituent,
substitute, substitution, succedaneum, such, suchlike, superseder,
supplanter, surrogate, swapped, switched, symbiotic, symbol,
synchronized, synchronous, synecdoche, synonym, synonymous, tally,
tantamount, temporary, tentative, the like of, the likes of,
the same, the same difference, third string, tit for tat, token,
traded, transposed, twin, unanimous, understudy, undifferenced,
uniform, unisonant, unisonous, utility, utility player, very image,
very same, vicar, vicarious, vice-president, vice-regent

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