radius

See also Radius

English

A radius shown in red

Etymology

From Latin radius (“ray”)

Pronunciation

• Rhymes: -eɪdiəs

Noun

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

• radial
• radiate, radiation

See also

• ulna
• semidiameter
• Radius (bone) on Wikipedia.Wikipedia:Radius (bone)

Translations

bone (human)

• Arabic: كعبرة (ar) (kuʕbura) f

  Egyptian Arabic: كعبرة (kuʕbura) f

• Armenian: ճաճանչոսկր (hy) (č̣ač̣ančoskr)
• Bulgarian: лъчева кост
• Catalan: radi (ca) m
• Dutch: spaakbeen (nl) n
• Esperanto: radiuso (eo)
• Finnish: värttinäluu (fi)
• French: radius (fr) m
• German: Speiche (de) f, Radius (de) m
• Greek: κερκίς (el) (kerkís) f
• Hungarian: orsócsont (hu)
• Ido: radiuso (io)

• Irish: gaghéag f
• Italian: radio (it) m
• Japanese: 橈骨 (とうこつ, tōkotsu)
• Korean: 노뼈 (noppyeo), 요골 (撓骨, yogol)
• Mandarin: 橈骨 (cmn)
• Maori: āpiti (mi)
• Portuguese: rádio (pt) m
• Russian: лучевая кость (lučevája kost’) f
• Serbo-Croatian: žbica (sh) f, palčana kost (sh) f
• Spanish: radio (es) m
• Telugu: రత్ని (te)
• Ukrainian: променева кістка (uk) (promeneva kistka) f
• Volapük: radiut (vo)
• Welsh: radiws (cy) m

line segment

• Armenian: շառավիղ (hy) (šaṙaviġ)
• Bulgarian: радиус (bg) (radius) m
• Catalan: radi (ca) m
• Dutch: straal (nl) f
• Esperanto: radiuso (eo)
• Finnish: säde (fi)
• French: rayon (fr) m
• German: Radius (de) m
• Greek: ακτίνα (el) (aktína) f
• Hungarian: sugár (hu)
• Icelandic: radíus (is) m, geisli (is) m
• Ido: radiuso (io)
• Irish: ga (ga) m

• Japanese: 半径 (はんけい, hankei)
• Korean: 반지름 (banjireum)
• Macedonian: радиус (mk) (rádius) m, полупречник (mk) (polupréčnik) m
• Polish: promień (pl) m
• Portuguese: raio (pt) m
• Russian: радиус (ru) (rádius) m
• Scottish Gaelic: spòg (gd) f
• Serbo-Croatian:

  Cyrillic: полупречник m

  Roman: poluprečnik m

• Slovene: polmer (sl) m
• Spanish: radio (es) m
• Volapük: raid (vo)
• Welsh: radiws (cy) m

length of this line segment

• Armenian: շառավիղ (hy) (šaṙaviġ)
• Bulgarian: радиус (bg) (radius) m
• Catalan: radi (ca) m
• Czech: poloměr (cs) m
• Dutch: straal (nl) f
• Finnish: säde (fi)
• French: rayon (fr) m
• German: Halbmesser m, Radius m
• Hungarian: sugár (hu)
• Icelandic: radíus (is) m, geisli (is) m
• Irish: ga (ga) m
• Japanese: 半径 (はんけい, hankei)

• Korean: 반지름 (banjireum)
• Macedonian: радиус (mk) (rádius) m, полупречник (mk) (polupréčnik) m
• Polish: promień (pl) m
• Portuguese: raio (pt) m
• Russian: радиус (ru) (rádius) m
• Serbo-Croatian:

  Cyrillic: полупречник m

  Roman: poluprečnik m

• Slovene: polmer (sl) m
• Spanish: radio (es) m
• Volapük: raid (vo)
• Welsh: radiws (cy) m

Anagrams

• Darius

---

Crimean Tatar

Etymology

Latin radius.

Noun

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

1. radius.

Declension

    declension of radius

nominative	radius
genitive	radiusnıñ
dative	radiusqa
accusative	radiusnı
locative	radiusta
ablative	radiustan

References

• Useinov & Mireev Dictionary, Simferopol, Dolya, 2002 [1]

---

Esperanto

Verb

radius

1. conditional of radii

---

French

Noun

radius m (plural radius)

1. (anatomy) radius

Anagrams

• durais

---

Latin

Noun

radius (genitive radiī); m, second declension

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

Inflection

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

Descendants

Albanian: rreze Aromanian: radzã Catalan: raig, radi Dalmatian: rus, ruaz English: radius, ray French: rai, rayon Friulian: rai Italian: raggio, razza, radio

Occitan: rai Portuguese: raio Romanian: rază Russian: радиус Sardinian: ragiu Spanish: raya, rayo, raza, radio Venetian: rajo