subtraction 音标拼音: [səbtr'ækʃən]
n . 减去,减法
减去,减法
subtraction 减法
subtraction 减法
subtraction n 1 :
an arithmetic operation in which the difference between two numbers is calculated ; "
the subtraction of three from four leaves one "; "
four minus three equals one " [
synonym :
{
subtraction }, {
minus }]
2 :
the act of subtracting (
removing a part from the whole ); "
he complained about the subtraction of money from their paychecks " [
synonym : {
subtraction }, {
deduction }] [
ant :
{
addition }]
Compound \
Com "
pound \,
a . [
OE .
compouned ,
p .
p .
of compounen .
See {
Compound },
v .
t .]
Composed of two or more elements ,
ingredients ,
parts ;
produced by the union of several ingredients ,
parts ,
or things ;
composite ;
as ,
a compound word .
[
1913 Webster ]
Compound substances are made up of two or more simple substances . --
I .
Watts .
[
1913 Webster ]
{
Compound addition }, {
subtraction }, {
multiplication },
{
division } (
Arith .),
the addition ,
subtraction ,
etc .,
of compound numbers .
{
Compound crystal } (
Crystallog .),
a twin crystal ,
or one seeming to be made up of two or more crystals combined according to regular laws of composition .
{
Compound engine } (
Mech .),
a form of steam engine in which the steam that has been used in a high -
pressure cylinder is made to do further service in a larger low -
pressure cylinder ,
sometimes in several larger cylinders ,
successively .
{
Compound ether }. (
Chem .)
See under {
Ether }.
{
Compound flower } (
Bot .),
a flower head resembling a single flower ,
but really composed of several florets inclosed in a common calyxlike involucre ,
as the sunflower or dandelion .
{
Compound fraction }. (
Math .)
See {
Fraction }.
{
Compound fracture }.
See {
Fracture }.
{
Compound householder },
a householder who compounds or arranges with his landlord that his rates shall be included in his rents . [
Eng .]
{
Compound interest }.
See {
Interest }.
{
Compound larceny }. (
Law )
See {
Larceny }.
{
Compound leaf } (
Bot .),
a leaf having two or more separate blades or leaflets on a common leafstalk .
{
Compound microscope }.
See {
Microscope }.
{
Compound motion }.
See {
Motion }.
{
Compound number } (
Math .),
one constructed according to a varying scale of denomination ;
as ,
3 cwt .,
1 qr .,
5 lb .;
--
called also {
denominate number }.
{
Compound pier } (
Arch .),
a clustered column .
{
Compound quantity } (
Alg .),
a quantity composed of two or more simple quantities or terms ,
connected by the sign (
plus )
or - (
minus ).
Thus ,
a b -
c ,
and bb -
b ,
are compound quantities .
{
Compound radical }. (
Chem .)
See {
Radical }.
{
Compound ratio } (
Math .),
the product of two or more ratios ;
thus ab :
cd is a ratio compounded of the simple ratios a :
c and b :
d .
{
Compound rest } (
Mech .),
the tool carriage of an engine lathe .
{
Compound screw } (
Mech .),
a screw having on the same axis two or more screws with different pitch (
a differential screw ),
or running in different directions (
a right and left screw ).
{
Compound time } (
Mus .),
that in which two or more simple measures are combined in one ;
as ,
6 -
8 time is the joining of two measures of 3 -
8 time .
{
Compound word },
a word composed of two or more words ;
specifically ,
two or more words joined together by a hyphen .
[
1913 Webster ]
Subtraction \
Sub *
trac "
tion \,
n . [
L .
subtractio a drawing back .
See {
Subtract },
and cf . {
Substraction }.]
1 .
The act or operation of subtracting or taking away a part .
[
1913 Webster ]
2 . (
Math .)
The taking of a lesser number or quantity from a greater of the same kind or denomination ;
an operation for finding the difference between two numbers or quantities .
[
1913 Webster ]
3 . (
Law )
The withdrawing or withholding from a person of some right to which he is entitled by law .
[
1913 Webster ]
Note :
Thus the subtraction of conjugal rights is when either the husband or wife withdraws from the other and lives separate without sufficient reason .
The subtraction of a legacy is the withholding or detailing of it from the legatee by the executor .
In like manner ,
the withholding of any service ,
rent ,
duty ,
or custom ,
is a subtraction ,
for which the law gives a remedy .
--
Blackstone .
[
1913 Webster ]
88 Moby Thesaurus words for "
subtraction ":
abatement ,
abridgment ,
absence ,
abstraction ,
addition ,
alienation ,
alleviation ,
approximation ,
attenuation ,
awayness ,
blank ,
contraction ,
dampening ,
damping ,
decrease ,
decrement ,
decrescence ,
deduction ,
deflation ,
depreciation ,
depression ,
deprivation ,
detachment ,
differentiation ,
diminishment ,
diminution ,
disarticulation ,
disassociation ,
disconnectedness ,
disconnection ,
discontinuity ,
discount ,
disengagement ,
disjointing ,
disjunction ,
dislocation ,
disunion ,
division ,
divorce ,
divorcement ,
dying ,
dying off ,
equation ,
evolution ,
extenuation ,
extrapolation ,
fade -
out ,
incoherence ,
integration ,
interpolation ,
inversion ,
involution ,
isolation ,
lack ,
languishment ,
lessening ,
letup ,
lowering ,
luxation ,
miniaturization ,
mitigation ,
multiplication ,
neverness ,
nonexistence ,
nonoccurrence ,
nonpresence ,
notation ,
nowhereness ,
parting ,
partition ,
practice ,
proportion ,
rebate ,
reduction ,
relaxation ,
removal ,
sagging ,
scaling down ,
segmentation ,
separation ,
separatism ,
simplicity ,
subdivision ,
transformation ,
want ,
weakening ,
withdrawal ,
zoning
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