北美用語中以此詞彙指稱不具平行邊的四邊形；在英國與其他特定地區的用語中，此詞彙所指和北美用語中的「梯形」（trapezoids）相同，也就是具有一對平行邊的四邊形。

不規則四邊形(P,,U,繁體中文-偏好,D,U,U)
pu kuei tse ssu pien hsing(P,,U,韋氏拼音-偏好,UF,U,U)
bù guī zé sì biān xíng(P,,U,漢語拼音-偏好,UF,U,U)
bu gui ze si bian xing(P,,U,漢語拼音(無聲調)-偏好,UF,U,U)
trapeziums(irregular quadrilateral)　(P,,U,美式英語-偏好,D,U,PN)
trapezium(irregular quadrilateral)　(,U,美式英語-非偏好,AD,U,PN)
trapezium(polygonen)　(,U,荷蘭語-非偏好,AD,U,SN)
trapezia(irregular)　(,U,美式英語-非偏好,UF,U,PN)
trapezia(polygonen)　(,U,荷蘭語-非偏好,D,U,PN)
irregular quadrilaterals(P,,U,British English-偏好,D,U,PN)
irregular quadrilateral(,U,British English-非偏好,AD,U,SN)
trapecios(P,,U,西班牙語-偏好,D,U,PN)
trapecio(,U,西班牙語-非偏好,AD,U,SN)

藝術與建築詞典根目錄
....關聯概念層面
........關聯概念
............<科學概念>
................<數學概念>
....................<幾何概念>
........................幾何圖形 (幾何概念)
............................平面圖形
................................多邊形 (平面圖形)
....................................四邊形
........................................不規則四邊形

distinguished from....	梯形
is basis of....	不規則四邊形的(無平行邊)

英文....	In North America, "trapeziums" are quadrilateral figures having no parallel sides. In Britain and certain other places, "trapeziums" are the same as "trapezoids" in North America, that is, figures having one set of parallel lines.
荷蘭語....	Alle vierhoeken waarvan minstens één paar tegenoverliggende zijden parallel loopt.
西班牙語....	Cualquier figura plana rectilínea de cuatro lados que no son paralelógramos.

不規則四邊形............	[AS-Academia Sinica]
.................	國立編譯館學術名詞資訊網 December 26, 2011
.................	中央研究院中英雙語知識本體詞網 December 26, 2011
.................	智慧藏百科全書網 December 26, 2011
.................	遠東實用英漢辭典 p. 1359
pu kuei tse ssu pien hsing............	[AS-Academia Sinica]
.................	TELDAP database (2009-)
bù guī zé sì biān xíng............	[AS-Academia Sinica]
.................	TELDAP database (2009-)
bu gui ze si bian xing............	[AS-Academia Sinica]
.................	TELDAP database (2009-)
trapeziums(irregular quadrilateral)............	[VP]
.................	Meyer, Handbook of Ornament (1957) 21
.................	Webster's 9th New Collegiate Dictionary (1985) 1256
.................	Random House Dictionary of the English Language (1987) illustration
trapezium(irregular quadrilateral)............	[VP]
.................	AAT-Ned (1994-)
.................	Encyclopedia Britannica Online (2002-)
trapezia(irregular)............	[VP]
.................	Webster's 9th New Collegiate Dictionary (1985) 1256
.................	AAT-Ned (1994-)
irregular quadrilaterals............	[VP]
.................	Encyclopedia Britannica Online (2002-) "Euclidian geometry," accessed 2 February 2012
irregular quadrilateral............	[VP]
.................	Encyclopedia Britannica Online (2002-)
trapecios............	[VP]
.................	TAA database (2000-)
trapecio............	[VP]
.................	Instituto Colombiano de Cultura, Bienes Culturales Muebles - Manual para Inventario (1991)
Subject:............	[AS-Academia Sinica]
.................	Van Dale hedendaags Nederlands (1994)
.................	Van Dale Engels-Nederlands (1989)

Getty AAT: 300009804 Getty AAT: http://www.getty.edu/vow/AATFullDisplay?find=costume&logic=AND¬e=&subjectid=300009804
聯合目錄： 不規則四邊形 、pu kuei tse ssu pien hsing 、bù guī zé sì biān xíng 、bu gui ze si bian xing 、trapeziums 、trapezium 、trapezia 、irregular quadrilaterals 、irregular quadrilateral 、trapezium 、trapezia 、trapecios 、trapecio