e/Toroidal coordinates

Information
has gloss	eng: Toroidal coordinates are a three-dimensional orthogonal coordinate system that results from rotating the two-dimensional bipolar coordinate system about the axis that separates its two foci. Thus, the two foci F_1} and F_2} in bipolar coordinates become a ring of radius a in the xy plane of the toroidal coordinate system; the z-axis is the axis of rotation. The focal ring is also known as the reference circle.
lexicalization	eng: toroidal coordinates
instance of	(noun) a system that uses coordinates to establish position reference system, coordinate system, frame of reference, reference frame

Meaning
Portuguese
has gloss	por: Coordenadas toroidais são um sistema de coordenadas ortogonais, tridimensional que é gerado pela rotação do sistema de coordenadas bipolares sobre um eixo que separa seus dois focos. Assim, os dois focos F_1} e F_2} em coordenadas bipolares se tornam um anel de raio a no plano xy plane do sistema de coordenadas toroidais; o eixo z é o eixo de rotação.
lexicalization	por: coordenadas toroidais
Chinese
has gloss	zho: <div style="float:right;width:350px;"> 圓環坐標系是一種三維正交坐標系。設定二維橢圓坐標系包含於 xz-平面；兩個焦點 F_1}\,\! 與 F_2}\,\! 的直角坐標分別為 ( - a,\ 0,\ 0)\,\! 與 (a,\ 0,\ 0)\,\! 。將雙極坐標系繞著 z-軸旋轉，則可以得到圓環坐標系。雙極坐標系的兩個焦點，變為一個半徑為 a\,\! 的圓圈，包含於圓環坐標系的 xy-平面。稱這圓圈為焦圓，又稱為參考圓。
lexicalization	zho: 圓環坐標系