Meanings
plural diameters · alternative dated nonstandard diametre · alternative abbreviation ⌀
- geometryAny straight line between two points on the circumference of a circle that passes through the center of the circle; a chord that passes through the center of the circle.
- geometryThe length of such a line.
Viable non-malformed singleton pregnancies were selected for cerebellar measurements; transcerebellar diameter, (TCD), left and right cerebellar diameters (LCD, RCD).
2015 October 23, “Periconception Maternal Folate Status and Human Embryonic Cerebellum Growth Trajectories: The Rotterdam Predict Study”, in PLOS ONE, →DOI1 more example
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.
2005, David A. Stephenson, John S. Agapiou, Metal Cutting Theory and Practice, page 280 - geometryThe maximum distance between any two points in a metric space.
- graph theoryThe maximum eccentricity over all vertices in a graph.
Synonyms & antonyms
nounthe length of a straight line passing through the center of a circle and connecting two points on the circumference
Synonym sets from Open English WordNet, CC BY 4.0.
Origin
- Proto-Indo-European*dwóh₁
- Proto-Indo-European*trísinflu.
- Proto-Indo-European*dwís
- Ancient Greekδιά (diá)
- Ancient Greekδῐᾰ- (dĭă-)
- Proto-Indo-European*med-
- Proto-Indo-European*meh₁-
- Ancient Greekμέτρον (métron)
- Ancient Greekδιάμετρος (diámetros)
- Latindiametros
- Old Frenchdiametre
- Englishdiameter
From Old French diametre (French diamètre), from Latin diametros, from Ancient Greek διάμετρος (diámetros) (γραμμή (grammḗ)) (diametros grammē, “line measuring across”), from διά (diá, “across”) + μέτρον (métron, “measure”). By surface analysis, dia- + -meter.
More words from Old French, Latin, Ancient Greek
Full word history & related roots →Translations
Afrikaans deursnee
- deursneeline
Ancient Greek διάμετρος
- διάμετρος (diámetros)line
Arabic قُطْر, قُطْر
- قُطْر (quṭr)line
- قُطْر (quṭr)length of this line
Basque diametro
- diametroline
Bengali ব্যাস, ব্যাস
- ব্যাস (bês)line
- ব্যাস (bês)length of this line
Bulgarian диаметър
- диаметър (diametăr)line
Catalan diàmetre, diàmetre
- diàmetreline
- diàmetrelength of this line
Chinese Cantonese 直徑 /直径, 直徑 /直径
- 直徑 /直径 (zik⁶ ging³)line
- 直徑 /直径 (zik⁶ ging³)length of this line
Chinese Mandarin 直徑 /直径, 直徑 /直径
- 直徑 /直径 (zhíjìng)line
- 直徑 /直径 (zhíjìng)length of this line
Czech průměr, průměr
- průměrline
- průměrlength of this line
Danish diameter, tværmål
- diameterline
- tværmålline
- diameterlength of this line
Dutch middellijn, diameter
- middellijnline
- diameterline
- diameterlength of this line
- doorsnedelength of this line
Esperanto diametro
- diametroline
Estonian diameeter
- diameeterline
Finnish halkaisija, läpimitta
- halkaisijaline
- läpimittalength of this line
French diamètre, diamètre
- diamètreline
- diamètrelength of this line
German Durchmesser, Diameter
- Durchmesserline
- Diameterline
- Durchmesserlength of this line
- Diameterlength of this line
Greek διάμετρος, διάμετρος
- διάμετρος (diámetros)line
- διάμετρος (diámetros)length of this line
Hebrew קוטר, קוטר
- קוטר (qot'er)line
- קוטר (qot'er)length of this line
Hindi व्यास, व्यास
- व्यास (vyās)line
- व्यास (vyās)length of this line
Hungarian átmérő
- átmérőline
Icelandic þvermál
- þvermálline
Indonesian diameter
- diameterline
Irish lárlíne, trastomhas
- lárlíneline
- trastomhaslength of this line
Italian diametro, diametro
- diametroline
- diametrolength of this line
- diametrograph theory
Japanese 直径, 直径
- 直径 (chokkei)line
- 直径 (chokkei)length of this line
Korean 지름, 직경
- 지름 (jireum)line
- 직경 (jikgyeong)length of this line
Latin diametros
- diametrosline
Latvian diametrs
- diametrsline
Lithuanian diametras
- diametrasline
Malay garis pusat, diameter
- garis pusatline
- diameterline
- garis pusatlength of this line
- diameterlength of this line
Māori whitianga
- whitiangaline
Norwegian Bokmål diameter, diameter
- diameterline
- diameterlength of this line
Persian قطر, ترامون
- قطر (qotr)line
- ترامون (tarâmun)line
- گنج دوله (gonj-e dowle)line
- گنج (gonj)line
Polish średnica, średnica
- średnicaline
- średnicalength of this line
Portuguese diâmetro, diâmetro
- diâmetroline
- diâmetrolength of this line
Romanian diametru
- diametruline
Russian диа́метр, попере́чник
- диа́метр (diámetr)line
- попере́чник (poperéčnik)line
- диа́метр (diámetr)length of this line
Slovak priemer
- priemerline
Spanish diámetro, diámetro
- diámetroline
- diámetrolength of this line
Swahili kipenyo, kipenyo
- kipenyoline
- kipenyolength of this line
Swedish diameter, diameter
- diameterline
- diameterlength of this line
Tagalog bantod, diyametro
- bantodline
- diyametroline
- bantodlength of this line
- diyametrolength of this line
Thai เส้นผ่าศูนย์กลาง, เส้นผ่านศูนย์กลาง
- เส้นผ่าศูนย์กลาง (sên-pàa-sǔun-glaang)line
- เส้นผ่านศูนย์กลาง (sen-phan-sun-klang)line
Turkish çap
- çapline
Ukrainian діа́метр, попере́чник
- діа́метр (diámetr)line
- попере́чник (poperéčnyk)line
Urdu قطر
- قطر (qotr)line
Vietnamese đường kính
- đường kínhline
Welsh diamedr, diamedr
- diamedrline
- diamedrlength of this line
Yiddish דיאַמעטער
- דיאַמעטער (dyameter)line
Rhymes & wordplay
Rhymes with diameter
All rhymes →Anagrams
Cite this entry
diameter. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/diameter
“diameter.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/diameter. Accessed November 2, 2026.
WatkinsX Dictionary, s.v. “diameter,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/diameter.
Source: diameter on Wiktionary, CC BY-SA 4.0.