Word:

Radius

Ra´di`us   Pronunciation: rā´dĭ`ŭs
n.1.(Geom.) A right line drawn or extending from the center of a circle to the periphery; the semidiameter of a circle or sphere.
2.(Anat.) The preaxial bone of the forearm, or brachium, corresponding to the tibia of the hind limb. See Illust. of Artiodactyla.
3.(Bot.) A ray, or outer floret, of the capitulum of such plants as the sunflower and the daisy. See Ray, 2.
4.(Zool.) The barbs of a perfect feather.
5.The movable limb of a sextant or other angular instrument.
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.
Noun1.Radiusradius - the length of a line segment between the center and circumference of a circle or sphere
Synonyms: r
2.radius - a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere)
3.radius - a circular region whose area is indicated by the length of its radius; "they located it within a radius of 2 miles"
4.radius - the outer and slightly shorter of the two bones of the human forearm
5.radius - support consisting of a radial member of a wheel joining the hub to the rim
Synonyms: spoke
RADIUS - Remote Authentication Dial-In User Service
Remote Authentication Dial-In User Service (RFC 2865)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, 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, perpendicular, proportion, proportions, purview, radiance, radiation, radius vector, ray, register, right line, ring, rondelle, round, roundel, saucer, scale, scattering, 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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Radiotelegraphic
radiotelegraphic signal
Radiotelegraphy
Radiotelephone
radiotelephonic
radiotelephony
radiotherapist
Radiotherapy
radiotherapy equipment
radiothorium
radious
Radish
Radish fly
radish plant
Radium
radium therapy
-- Radius --
Radius bar
radius of curvature
Radius of gyration
Radius vector
Radix
radome
Radon
Radoub
RADSL
Radula
Raduliform
Radyera
Radyera farragei
raetam
RAF
Raff
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