What does radius mean?

Definitions for radius
ˈreɪ di əs; -diˌaɪra·dius

Here are all the possible meanings and translations of the word radius.

Princeton's WordNet

  1. radius, r(noun)

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

  2. radius(noun)

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

  3. radius(noun)

    a circular region whose area is indicated by the length of its radius

    "they located it within a radius of 2 miles"

  4. radius(noun)

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

  5. spoke, wheel spoke, radius(noun)

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


  1. radius(Noun)

    The long bone in the forearm, on the side of the thumb.

  2. radius(Noun)

    The lighter bone (or fused portion of bone) in the forelimb of an animal.

  3. radius(Noun)

    A line segment between any point on the circumference of a circle and its center/centre.

  4. radius(Noun)

    The length of this line segment.

  5. Origin: From radius

Webster Dictionary

  1. Radius(noun)

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

  2. Radius(noun)

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

  3. Radius(noun)

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

  4. Radius(noun)

    the barbs of a perfect feather

  5. Radius(noun)

    radiating organs, or color-markings, of the radiates

  6. Radius(noun)

    the movable limb of a sextant or other angular instrument

  7. Origin: [L., a staff, rod, spoke of a wheel, radius, ray. See Ray a divergent line.]



    Remote Authentication Dial In User Service is a networking protocol that provides centralized Authentication, Authorization, and Accounting management for computers that connect and use a network service. RADIUS was developed by Livingston Enterprises, Inc. in 1991 as an access server authentication and accounting protocol and later brought into the Internet Engineering Task Force standards. Because of the broad support and the ubiquitous nature of the RADIUS protocol, it is often used by ISPs and enterprises to manage access to the Internet or internal networks, wireless networks, and integrated e-mail services. These networks may incorporate modems, DSL, access points, VPNs, network ports, web servers, etc. RADIUS is a client/server protocol that runs in the application layer, using UDP as transport. The Remote Access Server, the Virtual Private Network server, the Network switch with port-based authentication, and the Network Access Server, are all gateways that control access to the network, and all have a RADIUS client component that communicates with the RADIUS server. The RADIUS server is usually a background process running on a UNIX or Microsoft Windows server. RADIUS serves three functions:

Chambers 20th Century Dictionary

  1. Radius

    rā′di-us, n. (geom.) a straight line from the centre to the circumference of a circle: anything like a radius, as the spoke of a wheel: a ray: (anat.) the exterior bone of the arm: (bot.) the ray of a flower: the movable arm of a sextant: one of the radiating lines of a geometrical spider's web:—pl. Rā′dii (ī).—ns. Rā′dius-bar, -rod, in a steam-engine, a rod pivoted at one end and connected at the other with a concentrically moving part at a fixed distance.—Radius vector (pl. Radii vectores), the distance from a fixed origin to any point of a curve. [L., a rod.]

Dictionary of Nautical Terms

  1. radius

    The semi-diameter of a circle, limb of a sextant, &c.

Military Dictionary and Gazetteer

  1. radius

    In fortification, a term applied to a line drawn from the centre of the polygon to the extremity of the exterior side. There are the exterior, the interior, and the right radii.

Suggested Resources

  1. radius

    Song lyrics by radius -- Explore a large variety of song lyrics performed by radius on the Lyrics.com website.

How to pronounce radius?

  1. Alex
    US English

How to say radius in sign language?

  1. radius


  1. Chaldean Numerology

    The numerical value of radius in Chaldean Numerology is: 8

  2. Pythagorean Numerology

    The numerical value of radius in Pythagorean Numerology is: 9

Examples of radius in a Sentence

  1. Nopporn Mahakanta:

    They were within a 1 km radius of the pigs that had fallen ill and died.

  2. Dango Kumwenda:

    This was probably the only gas station within like a 10-mile radius with gas.

  3. Albert Einstein:

    The horizon of many people is a circle with a radius of zero. They call this their point of view.

  4. Veenu Gupta:

    We have to do a very intensive survey within a 3 kilometer radius of where the first case was recorded.

  5. Joe Talbot:

    There is a pit forming the radius of which is only men. 'A circle (pit) with no women in is not a circle but a fallace

Images & Illustrations of radius

  1. radiusradiusradiusradiusradius

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Translations for radius

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"radius." Definitions.net. STANDS4 LLC, 2019. Web. 18 Oct. 2019. <https://www.definitions.net/definition/radius>.

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