diameter

English

Diameter shown as a red line

Alternative forms

• diametre (chiefly dated or nonstandard)
• ⌀ (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”). By surface analysis, dia- +‎ -meter.

Pronunciation

• (Received Pronunciation) IPA^(key): /daɪˈæmɪtə(ɹ)/
• (General American) enPR: dī-ăm'ĭtər, IPA^(key): /daɪˈæmɪdɚ/, /daɪˈæmədɚ/

• 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; a chord that passes through the center of the circle.
2. (geometry) The length of such a line.
   • 2005, David A. Stephenson, John S. Agapiou, Metal Cutting Theory and Practice, page 280:

     In cases without good face contact, the diameter of the toolholder at the front of the flange or the tool itself should not be any larger than the gage diameter of the toolholder shank from a bending stiffness viewpoint.

   • 2015 October 23, “Periconception Maternal Folate Status and Human Embryonic Cerebellum Growth Trajectories: The Rotterdam Predict Study”, in PLOS ONE‎^[1], →DOI:

     Viable non-malformed singleton pregnancies were selected for cerebellar measurements; transcerebellar diameter, (TCD), left and right cerebellar diameters (LCD, RCD).

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.

Derived terms

• aerodiameter
• circumdiameter
• diameterwise
• inner diameter
• inside diameter
• internal diameter
• major diameter
• minor diameter
• multidiameter
• tactical diameter

 

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 (bn) (bês)
• Bulgarian: диаметър m (diametǎr)
• Catalan: diàmetre (ca) m
• Cebuano: latastid
• Chinese:

  Cantonese: 直徑 / 直径 (zik⁶ ging³)

  Mandarin: 直徑 / 直径 (zh) (zhíjìng)

• Czech: průměr (cs) m
• Danish: diameter (da) c, tværmål n
• Dutch: middellijn (nl) f, diameter (nl) m
• Esperanto: diametro
• Estonian: diameeter
• Faroese: tvørmál n
• Finnish: halkaisija (fi)
• French: diamètre (fr) m
• Galician: diámetro (gl) m
• Georgian: დიამეტრი (diameṭri)
• German: Durchmesser (de) m, Diameter m
• Greek: διάμετρος (el) f (diámetros)

  Ancient: διάμετρος f (diámetros)

• Gujarati: વ્યાસ (gu) (vyās)
• Haitian Creole: dyamèt
• Hebrew: קוטר (he) m (qot'er)
• Hindi: व्यास (hi) m (vyās)
• Hungarian: átmérő (hu)
• Icelandic: þvermál (is) n
• Ido: diametro (io)
• Indonesian: diameter (id)
• Iquito: acajinacúraji
• Irish: lárlíne f
• Italian: diametro (it) m
• Japanese: 直径 (ja) (ちょっけい, chokkei)
• Kannada: ವ್ಯಾಸ (kn) (vyāsa)
• Khmer: អង្កត់ផ្ចិត (ʼɑngkɑt phcət)
• Korean: 지름 (ko) (jireum)
• Kurdish:

  Central Kurdish: تیرە (tîre)

  Northern Kurdish: tîre (ku)

• Latin: diametros f
• 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), ترامون (tarâmun), گنج دوله (gonj-e dowle) (archaic), گنج (fa) (gonj) (archaic)
• Polish: średnica (pl) f
• Portuguese: diâmetro (pt) m
• Romagnol: diàmetar 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, diyametro
• Thai: เส้นผ่าศูนย์กลาง, เส้นผ่านศูนย์กลาง (sen-phan-sun-klang)
• Turkish: çap (tr)
• Ukrainian: діа́метр m (diámetr), попере́чник m (poperéčnyk)
• 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 (bn) (bês)
• Catalan: diàmetre (ca) m
• Chinese:

  Cantonese: 直徑 / 直径 (zik⁶ ging³)

  Mandarin: 直徑 / 直径 (zh) (zhíjìng)

• Czech: průměr (cs) m
• Danish: diameter (da) c
• Dutch: diameter (nl) m, doorsnede (nl) m or f
• Finnish: läpimitta (fi)
• French: diamètre (fr) m
• Galician: diámetro (gl) m
• German: Durchmesser (de) m, Diameter m
• Greek: διάμετρος (el) f (diámetros)
• Haitian Creole: dyamèt
• Hebrew: קוטר (he) m (qot'er)
• Hindi: व्यास (hi) m (vyās)
• Irish: trastomhas m
• Italian: diametro (it) m
• Japanese: 直径 (ja) (ちょっけい, chokkei)
• Kannada: ವ್ಯಾಸ (kn) (vyāsa), ವ್ಯಾಸದ ಉದ್ದ (vyāsada udda)
• Korean: 직경 (ko) (jikgyeong)
• Kurdish:

  Northern Kurdish: tîre (ku) f

• Macedonian: дијаметар m (dijametar), пречник m (prečnik)
• Malay: garis pusat, diameter
• Norwegian:

  Bokmål: diameter (no) m

  Nynorsk: diameter (nn) m

• Polish: średnica (pl) f
• 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, diyametro
• Walloon: diyamete (wa) m
• Welsh: diamedr m

graph theory

• Italian: diametro (it) m

See also

• circumference
• radius

Anagrams

• Demetria, diametre, diatreme

Danish

Noun

diameter c (singular definite diameteren, plural indefinite diametre)

1. a diameter

References

• “diameter” in Den Danske Ordbog

Dutch

Etymology

Borrowed from French diamètre, from Latin diametrus, from Ancient Greek διάμετρος (diámetros). Equivalent to dia- +‎ meter.

Pronunciation

• IPA^(key): /ˈdi.aːˌmeː.tər/

• Audio:

  (file)

• Hyphenation: di‧a‧me‧ter

Noun

diameter m (plural diameters, diminutive diametertje n)

1. diameter (length of diametrical chord)
2. diameter (diametrical chord)

   Synonym: middellijn

Descendants

• → Indonesian: diameter

See also

• straal
• omtrek
• doorsnee

Indonesian

Etymology

From Dutch diameter, from French diamètre, from Latin diametrus, from Ancient Greek διάμετρος (diámetros).

Pronunciation

• IPA^(key): [dia̯ˈmɛtər]
• Hyphenation: dia‧mè‧têr

Noun

diamètêr (uncountable)

1. (geometry) diameter.

Synonyms

• garis tengah
• tampang

 

Derived terms

• berdiameter

 

• diameter jarum
• diameter molekul
• diameter parabola

 

Further reading

• “diameter” in Kamus Besar Bahasa Indonesia, Jakarta: Agency for Language Development and Cultivation – Ministry of Education, Culture, Research, and Technology of the Republic of Indonesia, 2016.

Norwegian Bokmål

Noun

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

1. a diameter

Norwegian Nynorsk

Noun

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

1. a diameter

Swedish

Pronunciation

• Audio:

  (file)

Noun

diameter c

1. (geometry) diameter

Declension

Declension of diameter

		nominative	genitive
singular	indefinite	diameter	diameters
	definite	diametern	diameterns
plural	indefinite	diametrar	diametrars
	definite	diametrarna	diametrarnas

Anagrams

• meditera