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1. Dictionary

   ra·di·us

   /ˈrādēəs/

   noun

   • 1. a straight line from the center to the circumference of a circle or sphere.
   • ▪ a radial line from the focus to any point of a curve.
   • ▪ the length of the radius of a circle or sphere.
   • ▪ a specified distance from a center in all directions: "there are plenty of local pubs within a two-mile radius"
   • 2. the thicker and shorter of the two bones in the human forearm.
   • ▪ the corresponding bone in a vertebrate's foreleg or a bird's wing.
   • ▪ any of the main veins in an insect's wing.
   • 3. (in an echinoderm or coelenterate) any of the primary axes of radial symmetry.

   verb

   • 1. give a rounded form to (a corner or edge): "Brian carefully radiused all the sharp edges and corners"

   Word Origin late 16th century (in radius (sense 2 of the noun)): from Latin, literally ‘staff, spoke, ray’.

   Scrabble Points: 7

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2. dictionary.cambridge.org › dictionary › englishRADIUS | English meaning - Cambridge Dictionary

   dictionary.cambridge.org › dictionary › english

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   (the length of) a straight line joining the centre of a circle to its edge or the centre of a sphere to its surface: The radius of this wheel is 30 cm.. This wheel has a radius of 30 cm. Encyclopaedia Britannica/Universal Images Group/GettyImages. a distance from a central point:

3. www.merriam-webster.com › dictionary › radiusRadius Definition & Meaning - Merriam-Webster

   www.merriam-webster.com › dictionary › radius

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   The meaning of RADIUS is a line segment extending from the center of a circle or sphere to the circumference or bounding surface. How to use radius in a sentence.

4. www.dictionary.com › browse › radiusRADIUS Definition & Meaning | Dictionary.com

   www.dictionary.com › browse › radius

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   Radius definition: a straight line extending from the center of a circle or sphere to the circumference or surface. See examples of RADIUS used in a sentence.

5. dictionary.cambridge.org › us › dictionaryRADIUS | definition in the Cambridge English Dictionary

   dictionary.cambridge.org › us › dictionary

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   RADIUS meaning: 1. (the length of) a straight line joining the centre of a circle to its edge or the centre of a…. Learn more.

6. www.vocabulary.com › dictionary › radiusRadius - Definition, Meaning & Synonyms | Vocabulary.com

   www.vocabulary.com › dictionary › radius

   noun. the length of a line segment between the center and circumference of a circle or sphere. synonyms: r. see more. noun. a circular region whose area is indicated by the length of its radius. “they located it within a radius of 2 miles” see more. noun. the outer and slightly shorter of the two bones of the human forearm. see more. Pronunciation.

7. www.mathsisfun.com › definitions › radiusRadius Definition (Illustrated Mathematics Dictionary) - Math is...

   www.mathsisfun.com › definitions › radius

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   Illustrated definition of Radius: The distance from the center to the circumference of a circle It is half of the circles...

8. www.collinsdictionary.com › dictionary › englishRADIUS definition and meaning | Collins English Dictionary

   www.collinsdictionary.com › dictionary › english

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   11 meanings: 1. a straight line joining the centre of a circle or sphere to any point on the circumference or surface 2. the.... Click for more definitions.

9. www.oxfordlearnersdictionaries.com › definition › englishradius noun - Definition, pictures, pronunciation and usage notes...

   www.oxfordlearnersdictionaries.com › definition › english

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   Definition of radius noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

10. dictionary.cambridge.org › dictionary › learner-englishRADIUS | meaning - Cambridge Learner's Dictionary

    dictionary.cambridge.org › dictionary › learner-english

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    RADIUS definition: 1. a certain distance from a particular point in any direction: 2. the distance from the centre of…. Learn more.

11. www.yourdictionary.com › radiusRadius Definition & Meaning | YourDictionary

    www.yourdictionary.com › radius

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    Radius Definition. Any straight line extending from the center to the periphery of a circle or sphere. A line segment that joins the center of a sphere with any point on its surface. A line segment that joins the center of a regular polygon with any of its vertices. The length of such a line.