Noun: radius
| Singular | radius |
| Plural | radii; radiuses |
Sample Sentences
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It is also obvious, and proved by experiment, that the rotatory motions observed in the hand proceed from the rotatory motions of the radius. [1808, John Barclay, The Muscular Motions of the Human Body, →OCLC, page 396:]
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Fatima claims to have visited all the bars within a five-mile radius of her Manhattan apartment.
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We start with spherical geometries. The two geometries on spheres of radiuses R₁ and R₂ are obviously identical if R₁ = R₂; moreover, the converse also holds. [1994, Viacheslav V. Nikulin, Igor R. Shafarevich, translated by Miles Reid, Geometries and Groups, Springer, page 194:]
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The velocity dispersions of early- and late-type galaxies in compact groups change little with groupcentric radius; the radii sampled are less than 100~h#123;-1#125; kpc, smaller than the radii typically sampled by members of massive clusters of galaxies. [2016, Jubee Sohn, Ho Seong Hwang, Margaret J. Geller, Antonaldo Diaferio, Kenneth J. Rines, Myung Gyoon Lee, Gwang-Ho Lee, “Compact Groups of Galaxies with Complete Spectroscopic Redshifts in the Local Universe”, in JKAS, volume 2015:]
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This contribution reduces with increasing distance p from the emitting surface element dA, due to conservation of energy, as the wave energy distributed across the spherical wave front remains constant, while the radius increases during ... [1998, Dieter Schuocker, Handbook of the Eurolaser Academy, Springer Science & Business Media, →ISBN, page 51:]
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[…] I can do more with a Quadrant, Sextant or Octant, of 1 foot Radius, furniſhed with Teleſcopical Sights and Screws, then ^([sic]) can poſſibly be done with any other Inſtrument, furniſhed only with Common Sights, though 10, 20, 30, nay threeſcore foot Radius; […] [1674, Robert Hooke, Animadversions on the Firſt Part of the Machina Coelestis of the […] Aſtronomer Johannes Hevelius […] , page 43:]
Nouns inflected like radius
renal calculus,
pylorus,
prolapsus,
parahippocampal gyrus,
hyperradius,
succubus,
scarabaeus,
colossus,
eucalyptus,
papyrus,
disfocus,
polypus,
phallus,
solidus,
silurus,
lenticular nucleus,
dinosaurus,
chorepiscopus,
ankylosaurus,
fusiform gyrus, etc. (List truncated at 20 nouns)
Etymology
Borrowed from Latin radius (“ray”). Doublet of ray. See: Latin Nouns '
radius'.