radius

[Ra·di*us]

If you're a detective working a crime investigation, you might be told to "search over a one mile radius," meaning, scope out everything that's within one mile of the crime scene.

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A right line drawn or extending from the center of a circle to the periphery; the semidiameter of a circle or sphere.

Noun
support consisting of a radial member of a wheel joining the hub to the rim

Noun
the length of a line segment between the center and circumference of a circle or sphere

Noun
the outer and slightly shorter of the two bones of the human forearm

Noun
a circular region whose area is indicated by the length of its radius; "they located it within a radius of 2 miles"

Noun
a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere)

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n.
A right line drawn or extending from the center of a circle to the periphery; the semidiameter of a circle or sphere.

n.
The preaxial bone of the forearm, or brachium, corresponding to the tibia of the hind limb. See Illust. of Artiodactyla.

n.
A ray, or outer floret, of the capitulum of such plants as the sunflower and the daisy. See Ray, 2.

n.
The barbs of a perfect feather.

n.
Radiating organs, or color-markings, of the radiates.

n.
The movable limb of a sextant or other angular instrument.

Radius

Ra"di*us , n.; pl. L. Radii ; E. Radiuses . [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. 2. (Anat.) The preaxial bone of the forearm, or brachium, corresponding to the tibia of the hind limb. See Illust. of Artiodactyla. &hand; The radius is on the same side of the limb as the thumb, or pollex, and in man it so articulated that its lower end is capable of partial rotation about the ulna. 3. (Bot.) A ray, or outer floret, of the capitulum of such plants as the sunflower and the daisy. See Ray, 2. 4. pl. (Zo'94l.) (a) The barbs of a perfect. (b) Radiating organs, or color-markings, of the radiates. 5. The movable limb of a sextant or other angular instrument. Knight. Radius bar (Math.), 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.

A right line drawn or extending from the center of a circle to the periphery; the semidiameter of a circle or sphere.

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Usage Examples

Imam Rauf and his backers have every legal right to build their extravagant Islamic center within the lethal radius of Ground Zero. But the rest of us have the right to question why they insist on doing so.

Misspelled Form

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