radius

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See also: Radius

English[edit]

A radius shown in red

Etymology[edit]

From Latin radius (ray)

Pronunciation[edit]

Noun[edit]

radius (plural radii or radiuses)

  1. (anatomy) The long bone in the forearm, on the side of the thumb.
  2. (zoology) The lighter bone (or fused portion of bone) in the forelimb of an animal.
  3. (geometry) A line segment between any point on the circumference of a circle and its center/centre.
  4. (geometry) The length of this line segment.

Related terms[edit]

See also[edit]

Translations[edit]

Anagrams[edit]


Crimean Tatar[edit]

Etymology[edit]

Latin radius.

Noun[edit]

radius (line segment or length of this line segment).

  1. radius.

Declension[edit]

References[edit]


Esperanto[edit]

Verb[edit]

radius

  1. conditional of radii

French[edit]

Noun[edit]

radius m (plural radius)

  1. (anatomy) radius

Anagrams[edit]


Latin[edit]

Etymology[edit]

Of uncertain origin. Some have tried to connect it to radix. Tucker suggests Proto-Indo-European *neredh- (extend forth, rise, outward) akin to Sanskrit वर्धते (vardhate, rise, grow), or from Ancient Greek ἄρδις (ardis, sharp point).[1]

Noun[edit]

radius m (genitive radiī); second declension

  1. ray (of light)
  2. staff, rod
  3. spoke (of a wheel)

Inflection[edit]

Second declension.

Number Singular Plural
nominative radius radiī
genitive radiī radiōrum
dative radiō radiīs
accusative radium radiōs
ablative radiō radiīs
vocative radie radiī

Descendants[edit]


References[edit]

  1. ^ Tucker, T.G., Etymological Dictionary of Latin, Ares Publishers, 1976 (reprint of 1931 edition).