sector 音标拼音: [s'ɛktɚ]
n . 扇形,尺规,函数尺
vt . 把…分成扇形
扇形,尺规,函数尺把…分成扇形
sector 区( 段 ); 段
S ;
SCT sector 扇区
sector n 1 :
a plane figure bounded by two radii and the included arc of a circle 2 :
a social group that forms part of the society or the economy ;
"
the public sector "
3 :
a particular aspect of life or activity ; "
he was helpless in an important sector of his life " [
synonym : {
sector }, {
sphere }]
4 :
the minimum track length that can be assigned to store information ;
unless otherwise specified a sector of data consists of 512 bytes 5 :
a portion of a military position 6 :
measuring instrument consisting of two graduated arms hinged at one end Sector \
Sec "
tor \,
n . [
L .,
properly ,
a cutter ,
fr .
secare ,
sectum ,
to cut :
cf .
F .
secteur .
See {
Section }.]
1 . (
Geom .)
A part of a circle comprehended between two radii and the included arc .
[
1913 Webster ]
2 .
A mathematical instrument ,
consisting of two rulers connected at one end by a joint ,
each arm marked with several scales ,
as of equal parts ,
chords ,
sines ,
tangents ,
etc .,
one scale of each kind on each arm ,
and all on lines radiating from the common center of motion .
The sector is used for plotting ,
etc .,
to any scale .
[
1913 Webster ]
3 .
An astronomical instrument ,
the limb of which embraces a small portion only of a circle ,
used for measuring differences of declination too great for the compass of a micrometer .
When it is used for measuring zenith distances of stars ,
it is called a zenith sector .
[
1913 Webster ]
{
Dip sector },
an instrument used for measuring the dip of the horizon .
{
Sector of a sphere },
or {
Spherical sector },
the solid generated by the revolution of the sector of a circle about one of its radii ,
or ,
more rarely ,
about any straight line drawn in the plane of the sector through its vertex .
[
1913 Webster ]
36 Moby Thesaurus words for "
sector ":
adjunct ,
component ,
contingent ,
crescent ,
cross section ,
detachment ,
detail ,
district ,
division ,
dole ,
fraction ,
half circle ,
hemicycle ,
installment ,
item ,
parcel ,
part ,
particular ,
percentage ,
portion ,
precinct ,
quadrant ,
quarter ,
quota ,
random sample ,
remainder ,
sample ,
sampling ,
section ,
segment ,
semicircle ,
sextant ,
share ,
subdivision ,
subgroup ,
subspecies
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