radius 音标拼音: [r'ediəs]
n . 半径,半径范围;辐,辐射线
半径,半径范围;辐,辐射线
radius 半径
radius 半径
radius n 1 :
the length of a line segment between the center and circumference of a circle or sphere [
synonym : {
radius }, {
r }]
2 :
a straight line from the center to the perimeter of a circle (
or from the center to the surface of a sphere )
3 :
a circular region whose area is indicated by the length of its radius ; "
they located it within a radius of 2 miles "
4 :
the outer and slightly shorter of the two bones of the human forearm 5 :
support consisting of a radial member of a wheel joining the hub to the rim [
synonym : {
spoke }, {
wheel spoke }, {
radius }]
Radius \
Ra "
di *
us \ (
r [=
a ]"
d [
i ^]*[
u ^]
s ),
n .;
pl .
L . {
Radii }
(
r [=
a ]"
d [
i ^]*[
imac ]);
E . {
Radiuses }
(
r [=
a ]"
d [
i ^]*[
u ^]
s *[
e ^]
z ). [
L .,
a staff ,
rod ,
spoke of a wheel ,
radius ,
ray .
See {
Ray }
a divergent line .]
1 . (
Geom .)
A right line drawn or extending from the center of a circle to the periphery ;
the semidiameter of a circle or sphere .
[
1913 Webster ]
2 . (
Anat .)
The preaxial bone of the forearm ,
or brachium ,
corresponding to the tibia of the hind limb .
See Illust .
of {
Artiodactyla }.
[
1913 Webster ]
Note :
The radius is on the same side of the limb as the thumb ,
or pollex ,
and in man it is so articulated that its lower end is capable of partial rotation about the ulna .
[
1913 Webster ]
3 . (
Bot .)
A ray ,
or outer floret ,
of the capitulum of such plants as the sunflower and the daisy .
See {
Ray },
2 .
[
1913 Webster ]
4 .
pl . (
Zool .)
(
a )
The barbs of a perfect feather .
(
b )
Radiating organs ,
or color -
markings ,
of the radiates .
[
1913 Webster ]
5 .
The movable limb of a sextant or other angular instrument .
--
Knight .
[
1913 Webster ]
{
Radius bar } (
Mach .),
a bar pivoted at one end ,
about which it swings ,
and having its other end attached to a piece which it causes to move in a circular arc .
{
Radius of curvature }.
See under {
Curvature }.
[
1913 Webster ]
143 Moby Thesaurus words for "
radius ":
O ,
air line ,
ambit ,
amplitude ,
annular muscle ,
annulus ,
approach ,
area ,
areola ,
asymptote ,
aureole ,
axis ,
beeline ,
bigness ,
body ,
bore ,
bottleneck ,
breadth ,
bulk ,
caliber ,
carry ,
chaplet ,
chord ,
circle ,
circuit ,
circumference ,
circus ,
closed circle ,
collision course ,
compass ,
concentralization ,
concentration ,
concourse ,
concurrence ,
confluence ,
conflux ,
congress ,
convergence ,
converging ,
corona ,
coronet ,
coverage ,
crossing ,
crown ,
cycle ,
depth ,
diadem ,
diagonal ,
diameter ,
diapason ,
diffusion ,
dimension ,
dimensions ,
direct line ,
directrix ,
discus ,
disk ,
dispersion ,
edge ,
emanation ,
eternal return ,
expanse ,
expansion ,
extension ,
extent ,
fairy ring ,
focalization ,
focus ,
funnel ,
gamut ,
garland ,
gauge ,
girth ,
glory ,
great -
circle course ,
greatness ,
halo ,
height ,
hub ,
largeness ,
lasso ,
length ,
logical circle ,
loop ,
looplet ,
magic circle ,
magnitude ,
mass ,
measure ,
measurement ,
meeting ,
mutual approach ,
narrowing gap ,
noose ,
normal ,
orbit ,
perpendicular ,
proportion ,
proportions ,
purview ,
radiance ,
radiation ,
radius vector ,
range ,
ray ,
reach ,
register ,
right line ,
ring ,
rondelle ,
round ,
roundel ,
saucer ,
scale ,
scattering ,
scope ,
secant ,
segment ,
semidiameter ,
shortcut ,
side ,
size ,
spectrum ,
sphincter ,
spoke ,
spokes ,
spread ,
straight ,
straight course ,
straight line ,
straight stretch ,
straightaway ,
streamline ,
stretch ,
sweep ,
tangent ,
transversal ,
vector ,
vicious circle ,
volume ,
wheel ,
width ,
wreath
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Radius of a Circle - Formula | What is Radius? | Radius Formula - Cuemath RADIUS Definition Meaning - Merriam-Webster Radius of a Circle – Definition, Formulas, Examples Radius of a Circle Calculator RADIUS | definition in the Cambridge English Dictionary How to Calculate the Radius of a Circle: Formulas More - wikiHow Radius of a Circle - Definition, Formula, Facts, Examples, radius - Wiktionary, the free dictionary Radius of a circle definition and calculator - Math Open Reference radius noun - Definition, pictures, pronunciation and usage notes . . .