constant 音标拼音: [k'ɑnstənt]
n . 常数,恒量
a . 不变的,一定的,时常的
常数,恒量不变的,一定的,时常的
constant 常数
constant 常数
constant adj 1 :
unvarying in nature ; "
maintained a constant temperature ";
"
principles of unvarying validity " [
synonym : {
changeless },
{
constant }, {
invariant }, {
unvarying }]
2 :
steadfast in purpose or devotion or affection ; "
a man constant in adherence to his ideals "; "
a constant lover ";
"
constant as the northern star " [
ant : {
inconstant }]
3 :
uninterrupted in time and indefinitely long continuing ; "
the ceaseless thunder of surf "; "
in constant pain "; "
night and day we live with the incessant noise of the city "; "
the never -
ending search for happiness "; "
the perpetual struggle to maintain standards in a democracy "; "
man '
s unceasing warfare with drought and isolation "; "
unremitting demands of hunger " [
synonym : {
ceaseless }, {
constant }, {
incessant }, {
never -
ending }, {
perpetual }, {
unceasing }, {
unremitting }]
n 1 :
a quantity that does not vary [
synonym : {
constant }, {
constant quantity }, {
invariable }]
2 :
a number representing a quantity assumed to have a fixed value in a specified mathematical context ; "
the velocity of light is a constant "
Constant \
Con "
stant \ (
k [
o ^]
n "
stant ),
a . [
L .
onstans , -
antis ,
p .
pr .
of constare to stand firm ,
to be consistent ;
con -
stare to stand :
cf .
F .
constant .
See {
Stand }
and cf . {
Cost },
v .
t .]
1 .
Firm ;
solid ;
fixed ;
immovable ; --
opposed to {
fluid }.
[
Obs .]
[
1913 Webster ]
If . . .
you mix them ,
you may turn these two fluid liquors into a constant body . --
Boyle .
[
1913 Webster ]
2 .
Not liable ,
or given ,
to change ;
permanent ;
regular ;
continuous ;
continually recurring ;
steadfast ;
faithful ;
not fickle .
Opposite of {
changeable }
and {
variable }.
[
1913 Webster ]
Both loving one fair maid ,
they yet remained constant friends . --
Sir P .
Sidney .
[
1913 Webster ]
I am constant to my purposes . --
Shak .
[
1913 Webster ]
His gifts ,
his constant courtship ,
nothing gained .
--
Dryden .
[
1913 Webster ]
Onward the constant current sweeps . --
Longfellow .
[
1913 Webster ]
3 . (
Math . &
Physics )
Remaining unchanged or invariable ,
as a quantity ,
force ,
law ,
etc .
[
1913 Webster ]
4 .
Consistent ;
logical . [
Obs .] --
Shak .
Syn :
Fixed ;
steadfast ;
unchanging ;
permanent ;
unalterable ;
immutable ;
invariable ;
perpetual ;
continual ;
resolute ;
firm ;
unshaken ;
determined .
Usage : {
Constant }, {
Continual }, {
Perpetual }.
These words are sometimes used in an absolute and sometimes in a qualified sense .
Constant denotes ,
in its absolute sense ,
unchangeably fixed ;
as ,
a constant mind or purpose .
In its qualified sense ,
it marks something as a "
standing "
fact or occurence ;
as ,
liable to constant interruptions ;
constantly called for .
Continual ,
in its absolute sense ,
coincides with continuous .
See {
Continuous }.
In its qualified sense ,
it describes a thing as occuring in steady and rapid succession ;
as ,
a round of continual calls ;
continually changing .
Perpetual denotes ,
in its absolute sense ,
what literally never ceases or comes to an end ;
as ,
perpetual motion .
In its qualified sense ,
it is used hyperbolically ,
and denotes that which rarely ceases ;
as ,
perpetual disturbance ;
perpetual noise ;
perpetual intermeddling .
[
1913 Webster ]
Constant \
Con "
stant \,
n .
1 .
That which is not subject to change ;
that which is invariable .
[
1913 Webster ]
2 . (
Math .)
A quantity that does not change its value ; --
used in countradistinction to {
variable }.
[
1913 Webster ]
3 . (
Astron .)
A number whose value ,
when ascertained (
as by observation )
and substituted in a general mathematical formula expressing an astronomical law ,
completely determines that law and enables predictions to be made of its effect in particular cases .
[
Webster 1913 Suppl .]
4 . (
Physics )
A number expressing some property or condition of a substance or of an instrument of precision ;
as ,
the dielectric constant of quartz ;
the collimation constant of a transit instrument .
[
Webster 1913 Suppl .]
5 . (
Computers )
a data structure that does not change during the course of execution of a program .
It may be a number ,
a string ,
or a more complex data structure ; --
contrasted with {
variable }.
[
PJC ]
{
Aberration constant },
or {
Constant of aberration } (
Astron .),
a number which by substitution in the general formula for aberration enables a prediction to be made of the effect of aberration on a star anywhere situated .
Its value is 20 [
sec ].
47 .
{
Absolute constant } (
Math .),
one whose value is absolutely the same under all circumstances ,
as the number 10 ,
or any numeral .
{
Arbitrary constant },
an undetermined constant in a differential equation having the same value during all changes in the values of the variables .
{
Gravitation constant } (
Physics ),
the acceleration per unit of time produced by the attraction of a unit of mass at unit distance .
When this is known the acceleration produced at any distance can be calculated .
{
Solar constant } (
Astron .),
the quantity of heat received by the earth from the sun in a unit of time .
It is ,
on the C .
G .
S .
system ,
0 .
0417 small calories per square centimeter per second . --
Young . [
Webster 1913 Suppl .]
{
Constant of integration } (
Math .),
an undetermined constant added to every result of integration .
[
1913 Webster Webster 1913 Suppl .]
336 Moby Thesaurus words for "
constant ":
abiding ,
accordant ,
active ,
age -
long ,
aged ,
ageless ,
alike ,
ancient ,
antique ,
ardent ,
articulated ,
assiduous ,
atom ,
atomic mass ,
atomic number ,
atomic weight ,
automatic ,
balanced ,
beaten ,
catenated ,
ceaseless ,
changeless ,
chattering ,
chronic ,
clinging ,
close ,
coeternal ,
colorfast ,
committed ,
compliant ,
concatenated ,
confirmed ,
conforming ,
connected ,
conscientious ,
consistent ,
consonant ,
continual ,
continued ,
continuing ,
continuous ,
correspondent ,
cyclical ,
dateless ,
dedicated ,
deep -
dyed ,
delicate ,
dependable ,
determined ,
devoted ,
devout ,
diligent ,
direct ,
diuturnal ,
dogged ,
double -
dyed ,
durable ,
duteous ,
dutiful ,
dyed -
in -
the -
wool ,
endless ,
enduring ,
equable ,
equal ,
eternal ,
eterne ,
even ,
ever -
being ,
ever -
durable ,
ever -
during ,
evergreen ,
everlasting ,
everliving ,
exact ,
express ,
fadeless ,
faithful ,
fast ,
featureless ,
fine ,
firm ,
fixed ,
flat ,
flinty ,
frequent ,
frozen ,
gapless ,
habitual ,
hackneyed ,
hardy ,
homogeneous ,
immediate ,
immemorial ,
immobile ,
immovable ,
immutable ,
inalterable ,
incessant ,
incommutable ,
inconvertible ,
indefatigable ,
indefeasible ,
indelible ,
indestructible ,
indomitable ,
industrious ,
inerrable ,
inerrant ,
inert ,
infallible ,
infinite ,
inflexible ,
ingrain ,
ingrained ,
insistent ,
insusceptible of change ,
intact ,
interminable ,
intransient ,
intransmutable ,
invariable ,
inveterate ,
invincible ,
inviolate ,
irretrievable ,
irreversible ,
irrevocable ,
joined ,
jointless ,
lasting ,
level ,
liege ,
linked ,
long -
lasting ,
long -
lived ,
long -
standing ,
long -
term ,
longeval ,
longevous ,
loyal ,
machine gun ,
macrobiotic ,
marble -
constant ,
mathematical ,
measured ,
mechanical ,
methodic ,
methodical ,
meticulous ,
micrometrically precise ,
microscopic ,
mindful ,
monolithic ,
monotonous ,
never -
ceasing ,
never -
ending ,
never -
tiring ,
nice ,
noble ,
nonreturnable ,
nonreversible ,
nonstop ,
nonterminating ,
nonterminous ,
observant ,
obstinate ,
of a piece ,
of long duration ,
of long standing ,
olamic ,
ordered ,
orderly ,
oscillating ,
patient ,
patient as Job ,
perdurable ,
perduring ,
perennial ,
periodic ,
permanent ,
perpetual ,
perseverant ,
persevering ,
persistent ,
persisting ,
pertinacious ,
pinpoint ,
plodding ,
plugging ,
practicing ,
precise ,
preoccupied ,
pulsating ,
punctilious ,
punctual ,
quantum ,
quiescent ,
rapid ,
rapt ,
recurrent ,
recurring ,
refined ,
regardful ,
regular ,
regular as clockwork ,
relentless ,
religious ,
religiously exact ,
remaining ,
repeated ,
repetitive ,
resolute ,
reverseless ,
rigid ,
rigorous ,
robotlike ,
round -
the -
clock ,
routine ,
running ,
scientific ,
scientifically exact ,
scrupulous ,
seamless ,
sedulous ,
sempervirent ,
sempiternal ,
serried ,
set ,
settled ,
severe ,
single -
minded ,
sleepless ,
slogging ,
smooth ,
solid ,
sot ,
square ,
stabile ,
stable ,
staccato ,
static ,
stationary ,
staunch ,
staying ,
steadfast ,
steady ,
steely ,
stereotyped ,
straight ,
strict ,
stubborn ,
stuttering ,
subtle ,
sustained ,
systematic ,
tenacious ,
tested ,
timeless ,
tireless ,
torpid ,
tough ,
tried ,
tried and true ,
trite ,
true ,
true -
blue ,
trusty ,
twenty -
four -
hour ,
unabating ,
unalterable ,
unalterative ,
unaltered ,
unbending ,
unbroken ,
unceasing ,
unchangeable ,
unchanged ,
unchanging ,
unchecked ,
unconquerable ,
undaunted ,
undeflectable ,
undestroyed ,
undeviating ,
undifferentiated ,
undiscouraged ,
undiversified ,
undrooping ,
unending ,
unerring ,
unfading ,
unfailing ,
unfaltering ,
unflagging ,
unflappable ,
unflinching ,
uniform ,
unintermitted ,
unintermittent ,
unintermitting ,
uninterrupted ,
unmodifiable ,
unmovable ,
unnodding ,
unrelaxing ,
unrelenting ,
unrelieved ,
unremitting ,
unrestorable ,
unreturnable ,
unruffled ,
unshakable ,
unshakeable ,
unshaken ,
unshifting ,
unsleeping ,
unstopped ,
unsusceptible ,
unswerving ,
untiring ,
unvariable ,
unvaried ,
unvarying ,
unwavering ,
unwearied ,
unwearying ,
unwinking ,
unyielding ,
utterly attentive ,
valence ,
vibrating ,
vital ,
weariless ,
well -
trodden ,
well -
worn ,
without end
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