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radius

ra·dius

UK/ˈɹeɪ.di.əs/ US/ˈreɪdiʌs/ fairly common

noun

1.

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

Synonyms
2.

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

3.

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

  • “they located it within a radius of 2 miles”
4.

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

5.

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

Synonyms

Origin

Borrowed from Latin radius (“ray”). Doublet of ray.

Phrases

  • atomic radius
  • blast radius
  • Bohr radius
  • covalent radius
  • Debye radius
  • distal radius
  • Earth radius
  • Einstein radius

Related words

Word family

Broader terms

Narrower terms

Parts

WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.