torsaladj.

/ˈtɔːsəl/

Etymology: < torse n.³ + -al suffix¹.

Geometry.

Of or relating to a torse: see quot. 1869.

ΘΚΠ

the world > relative properties > number > geometry > surface > [adjective]

monoid1863

anallagmatic1869

scrolar1869

torsal1869

closed1882

vicinal1895

orientable1920

non-orientable1925

1869 A. Cayley Coll. Math. Papers VI. 334 If there is at each point of the line one and the same tangent plane, then the section of the surface by the tangent plane contains the line at least twice; if it contain it twice only, the line is torsal; if three times the line is oscular, and the tangent plane containing the torsal or oscular line may in like manner be termed a torsal, or an oscular tangent plane.

This entry has not yet been fully updated (first published 1913; most recently modified version published online June 2018).

单词	torsal
释义	torsaladj. /ˈtɔːsəl/ Etymology: < torse n.³ + -al suffix¹. Geometry. Of or relating to a torse: see quot. 1869. ΘΚΠ the world > relative properties > number > geometry > surface > [adjective] monoid1863 anallagmatic1869 scrolar1869 torsal1869 closed1882 vicinal1895 orientable1920 non-orientable1925 1869 A. Cayley Coll. Math. Papers VI. 334 If there is at each point of the line one and the same tangent plane, then the section of the surface by the tangent plane contains the line at least twice; if it contain it twice only, the line is torsal; if three times the line is oscular, and the tangent plane containing the torsal or oscular line may in like manner be termed a torsal, or an oscular tangent plane. This entry has not yet been fully updated (first published 1913; most recently modified version published online June 2018). < adj.1869
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