diameter

English

Diameter shown as a red line

Alternative forms

• diametre
• ⌀ (abbreviation)

Etymology

From Old French diametre (French diamètre), from Latin diametrus, from Ancient Greek διάμετρος (diámetros) (γραμμή (grammḗ)) (diametros grammē, “line measuring across”), from διά (diá, “across”) + μέτρον (métron, “measure”).

Pronunciation

• (UK) IPA^(key): /daɪˈæmɪtə(ɹ)/

• Audio (US)

  (file)

Noun

diameter (plural diameters)

1. (geometry) Any straight line between two points on the circumference of a circle that passes through the centre/center of the circle.
2. (geometry) The length of such a line.
3. (geometry) The maximum distance between any two points in a metric space
4. (graph theory) The maximum eccentricity over all vertices in a graph.

Related terms

• diametric
• diametrically
• semidiameter

Translations

line

• Afrikaans: deursnee
• Arabic: قُطْر‎ (ar) m (quṭr)
• Armenian: տրամագիծ (hy) (tramagic)
• Azerbaijani: diametr (az)
• Basque: diametro
• Belarusian: дыя́метр m (dyjámjetr)
• Bengali: ব্যাস (bjas)
• Bulgarian: диаметър m (diametǎr)
• Catalan: diàmetre (ca) m
• Cebuano: latastid
• Chinese:

  Cantonese: 直徑, 直径 (zik⁶ ging³)

  Mandarin: 直徑 (zh), 直径 (zh) (zhíjìng)

• Czech: průměr (cs) m
• Danish: diameter (da) c
• Dutch: middellijn (nl) f, diameter (nl) m
• Esperanto: diametro
• Estonian: diameeter
• Finnish: halkaisija (fi)
• French: diamètre (fr) m
• Galician: diámetro m
• Georgian: დიამეტრი (diameṭri)
• German: Durchmesser (de) m
• Greek: διάμετρος (el) f (diámetros)
• Gujarati: વ્યાસ (gu) (vyās)
• Haitian Creole: dyamèt
• Hebrew: קוטר‎ (he) m (qot'er)
• Hindi: व्यास (hi) (vyās)
• Hungarian: átmérő (hu)
• Icelandic: þvermál (is) n
• Ido: diametro (io)
• Indonesian: diameter (id)
• Irish: lárlíne f
• Italian: diametro (it) m
• Japanese: 直径 (ja) (ちょっけい, chokkei)

• Korean: 지름 (ko) (jireum)
• Latin: line
• Latvian: diametrs m
• Lithuanian: diametras m
• Luxembourgish: Duerchmiesser (lb)
• Macedonian: дијаметар m (dijametar), пречник m (prečnik)
• Malay: garis pusat, diameter
• Maori: whitianga
• Marathi: व्यास (vyās)
• Norwegian:

  Bokmål: diameter (no) m

  Nynorsk: diameter (nn) m

• Persian: قطر‎ (fa) (qotr)
• Polish: średnica (pl) f
• Portuguese: diâmetro (pt) m
• Romanian: diametru (ro)
• Russian: диа́метр (ru) m (diámetr), попере́чник (ru) m (poperéčnik)
• Serbo-Croatian:

  Cyrillic: пречник m, промјер m

  Roman: prečnik (sh) m, promjer (sh) m

• Slovak: priemer m
• Slovene: premer (sl) m
• Spanish: diámetro (es) m
• Swahili: kipenyo (sw)
• Swedish: diameter (sv) c
• Tagalog: bantod
• Thai: เส้นผ่านศูนย์กลาง (sen-phan-sun-klang)
• Turkish: çap (tr)
• Ukrainian: діáметр m (diámetr)
• Urdu: قطر‎ (qotr)
• Vietnamese: đường kính (vi)
• Walloon: diyamete (wa) m
• Welsh: diamedr m
• Yiddish: דיאַמעטער‎ m (dyameter)

length of this line

• Arabic: قُطْر‎ (ar) m (quṭr)
• Armenian: տրամագիծ (hy) (tramagic)
• Bengali: ব্যাস (bjas)
• Catalan: diàmetre (ca) m
• Chinese:

  Cantonese: 直徑, 直径 (zik⁶ ging³)

  Mandarin: 直徑 (zh), 直径 (zh) (zhíjìng)

• Czech: průměr (cs) m
• Danish: diameter (da) c
• Dutch: diameter (nl) m, doorsnede (nl) m, f
• Finnish: läpimitta (fi)
• French: diamètre (fr) m
• German: Durchmesser (de) m
• Greek: διάμετρος (el) f (diámetros)
• Haitian Creole: dyamèt
• Hebrew: קוטר‎ (he) m (qot'er)
• Hindi: व्यास (hi) (vyās)
• Irish: trastomhas m
• Italian: diametro (it) m

• Japanese: 直径 (ja) (ちょっけい, chokkei)
• Korean: 직경 (ko) (jikgyeong)
• Macedonian: дијаметар m (dijametar), пречник m (prečnik)
• Malay: garis pusat, diameter
• Norwegian:

  Bokmål: diameter (no) m

  Nynorsk: diameter (nn) m

• Portuguese: diâmetro (pt) m
• Russian: диа́метр (ru) m (diámetr)
• Serbo-Croatian:

  Cyrillic: пречник m

  Roman: prečnik (sh) m

• Spanish: diámetro (es) m
• Swahili: kipenyo (sw)
• Swedish: diameter (sv) c
• Tagalog: bantod
• Walloon: diyamete (wa) m
• Welsh: diamedr m

graph theory

• Italian: diametro (it) m

See also

• circumference
• radius

Anagrams

• Demetria, diametre, diatreme

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Danish

Noun

diameter c (singular definite diameteren, plural indefinite diametre)

1. a diameter

References

• “diameter” in Den Danske Ordbog

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Dutch

Etymology

dia- +‎ meter

Pronunciation

• Audio

  (file)

• Hyphenation: di‧a‧me‧ter

Noun

diameter m (plural diameters, diminutive diametertje n)

1. diameter (length of diametrical chord)

See also

• middellijn
• straal
• omtrek
• doorsnee

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Norwegian Bokmål

Noun

diameter m (definite singular diameteren, indefinite plural diametere or diametre or diametrer, definite plural diameterne or diametrene)

1. a diameter

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Norwegian Nynorsk

Noun

diameter m (definite singular diameteren, indefinite plural diameterar or diametrar, definite plural diameterane or diametrane)

1. a diameter

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Swedish

Noun

diameter c

1. (geometry) diameter

Declension

Declension of diameter
	Singular		Plural
	Indefinite	Definite	Indefinite	Definite
Nominative	diameter	diametern	diametrar	diametrarna
Genitive	diameters	diameterns	diametrars	diametrarnas