Meanings
adjectiveequilateral (not comparable)
alternative archaic æquilateral
- not comparablegeometryHaving all the sides equal.
Kissinger had wanted to keep an “equilateral” distance between the US, USSR and China. Under Carter, they became de facto partners.
2025 April 12, Edward Luce, “The revenge of geopolitics”, in FT Weekend (Life & Arts section), London: The Financial Times Ltd., →ISSN, →OCLC, page 2 - not comparablegeometryHaving all the faces equal.
- not comparablebiologyHaving the two sides equal, as a surface divisible by a longitudinal median line into two halves of the same form.
- not comparablebiologyHaving all the convolutions of the shell in one plane, chiefly of foraminifers.
nounequilateral (plural equilaterals)
plural equilaterals · alternative archaic æquilateral
- A side exactly corresponding, or equal, to others.
- A figure having all its sides equal.
Synonyms & antonyms
adjectivehaving all sides or faces equal
Similar
Synonym sets from Open English WordNet, CC BY 4.0.
Origin
- Proto-Italic*aikʷos?
- Old Latinaiquos
- Latinaequus
- Latinaequi-
- Englishequi-
- Englishlateral
- Englishequilateral
Translations
Afrikaans ewesydig
- ewesydigreferring to a polygon all of whose sides are of equal length
Ancient Greek ἰσόπλευρος
- ἰσόπλευρος (isópleuros)referring to a polygon all of whose sides are of equal length
Bulgarian равностра́нен
- равностра́нен (ravnostránen)referring to a polygon all of whose sides are of equal length
Catalan equilàter
- equilàterreferring to a polygon all of whose sides are of equal length
Chinese Mandarin 等邊的 /等边的
- 等邊的 /等边的referring to a polygon all of whose sides are of equal length
Czech rovnostranný
- rovnostrannýreferring to a polygon all of whose sides are of equal length
Dutch gelijkzijdig
- gelijkzijdigreferring to a polygon all of whose sides are of equal length
Finnish tasasivuinen
- tasasivuinenreferring to a polygon all of whose sides are of equal length
French équilatéral
- équilatéralreferring to a polygon all of whose sides are of equal length
German gleichseitig
- gleichseitigreferring to a polygon all of whose sides are of equal length
Greek ισόπλευρος
- ισόπλευρος (isóplevros)referring to a polygon all of whose sides are of equal length
Hebrew שווה צלעות
- שווה צלעותreferring to a polygon all of whose sides are of equal length
Hungarian egyenlőoldalú
- egyenlőoldalúreferring to a polygon all of whose sides are of equal length
Italian equilatero
- equilateroreferring to a polygon all of whose sides are of equal length
Lithuanian lygiakraštis
- lygiakraštisreferring to a polygon all of whose sides are of equal length
Polish równoboczny
- równobocznyreferring to a polygon all of whose sides are of equal length
Portuguese equilátero
- equiláteroreferring to a polygon all of whose sides are of equal length
Russian равносторо́нний
- равносторо́нний (ravnostorónnij)referring to a polygon all of whose sides are of equal length
Spanish equilátero
- equiláteroreferring to a polygon all of whose sides are of equal length
Tagalog parigilid
- parigilidreferring to a polygon all of whose sides are of equal length
Ukrainian рівносторо́нній, рівнобі́чний
- рівносторо́нній (rivnostorónnij)referring to a polygon all of whose sides are of equal length
- рівнобі́чний (rivnobíčnyj)referring to a polygon all of whose sides are of equal length
Rhymes & wordplay
Rhymes with equilateral
lateralcollateralbilateralmultilateralunilateralcontralateraltrilateralipsilateralquadrilateralbasolateraldorsolateralventrolateralposterolateralanterolateralplurilateralacousticolateralambilateralapicolateralaxiolateralbasilateralcaudolateralcentrolateralcostolateralcraniolateral
All rhymes →Cite this entry
APA
equilateral. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/equilateral
MLA
“equilateral.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/equilateral. Accessed November 2, 2026.
Chicago
WatkinsX Dictionary, s.v. “equilateral,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/equilateral.
Source: equilateral on Wiktionary, CC BY-SA 4.0.