English Explanatory Dictionary

radius

English dictionary entry

Meanings

noun
  1. The long bone in the forearm, on the side of the thumb.
  2. The lighter bone (or fused portion of bone) in the forelimb of an animal.
  3. One of the major veins of the insect wing, between the subcosta and the media; the vein running along the costal edge of the discal cell.
  4. A line segment between any point of a circle or sphere and its center.
  5. The length of this line segment.
  6. Anything resembling a radius, such as the spoke of a wheel, the movable arm of a sextant, or one of the radiating lines of a spider's web.
  7. The minimum eccentricity of any vertex, for a given graph.
verb
  1. To give a rounded edge to.
noun
  1. Initialism of Remote Authentication Dial-In User Service.

Pronunciation

rā'-dē-əs /ˈɹeɪ.di.əs/ en-us-radius.ogg

Word forms

radius radii radiuses radiusing radiused

Etymology

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

Synonyms

R

Related words

radial radiad radiate radiation ulna semidiameter

Derived words

atomic radius blast radius Bohr radius circumradius covalent radius Debye radius distal radius Earth radius Einstein radius equiradiate exradius gyradius gyroradius Hill radius hydraulic radius hyperradius inradius interradius ionic radius metallic radius potato radius radian radion radius arm radius bar radius of action radius of convergence radius of curvature radius of gyration radius rod radius vector Roche radius Schwarzschild radius sight radius triradius van der Waals radius
This entry uses open data from Wiktionary (CC BY-SA/GFDL). Word forms are used for search and are not indexed as separate pages.
Back to search All on R Russian dictionary Dahl dictionary