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.

    Etymology: From radius

  2. radius(Noun)

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

    Etymology: From radius

  3. radius(Noun)

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

    Etymology: From radius

  4. radius(Noun)

    The length of this line segment.

    Etymology: 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

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

  2. Radius(noun)

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

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

  3. Radius(noun)

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

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

  4. Radius(noun)

    the barbs of a perfect feather

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

  5. Radius(noun)

    radiating organs, or color-markings, of the radiates

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

  6. Radius(noun)

    the movable limb of a sextant or other angular instrument

    Etymology: [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. Steven Parsons:

    This pulsating white dwarf we discovered is extremely important since we can use the binary motion and the eclipse to independently measure the mass and radius of this white dwarf, which helps us determine what it is made.

  2. Veenu Gupta:

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

  3. Kevin Robinson:

    With the Elysian in Chicago, we really started with the restaurant. That was our marketing -- we wanted to have the best restaurant in a mile radius and for it to be packed all the time, it worked, and that’s what we’re trying to do in these secondary markets, too. We really look at these projects as restaurants with hotels on top.

  4. Eddy Sanchez:

    Temperatures in the pyroclastic flow can exceed 700 degrees (Celsius) and volcanic ash can rain down on a 15 kilometer (9.32 miles) radius. That could cause more mud flows and nearby rivers to burst their banks.

  5. Tomoyuki Kudo:

    Some studies suggested the radius of the ring is about where [our] solar systems asteroid belt would be. Other observations put the size out where Neptune would be, our ALMA observations provided a clear answer: Both are right.

Images & Illustrations of radius

  1. radiusradiusradiusradiusradius

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Translations for radius

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"radius." Definitions.net. STANDS4 LLC, 2020. Web. 3 Aug. 2020. <https://www.definitions.net/definition/radius>.

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