cnicnoden.

/ˈnɪknəʊd/

Etymology: < Latin cnīcus, cnēcus safflower = Greek κνῆκος a plant of the thistle kind + Latin nodus knot, node.

Mathematics.

A conical point, a point where tangents form a cone of the second order.

ΘΚΠ

the world > relative properties > number > geometry > point > [noun] > of intersection or contact > of specific lines or curves

cuspis1646

focus1656

point of reflection1674

umbilicus1704

cuspid1743

cusp1758

rhamphoid1814

biplanar1849

oscnode1852

tacnode1852

tangential of a point1858

cnicnode1869

uniplane1869

unode1869

1869 A. Cayley Coll. Math. Papers (1893) VI. 330 I take account of conical and biplanar nodes, or, as I call them, cnicnodes, and binodes.

1869 A. Cayley Coll. Math. Papers (1893) VI. 334 Consider a surface having the cnicnode C = 1, and the reciprocal surface having the cnictrope C′ = 1.

1870 A. Cayley Coll. Math. Papers (1894) VII. 246 There may be on the nodal curve points which, in the classification of the surfaces, must be counted as cnicnodes.

Derivatives

ˈcnictrope n. (see trope n.), the reciprocal of a cnicnode.

ΘΚΠ

the world > relative properties > number > geometry > point > [noun] > of intersection or contact > reciprocal of

trope1875

cnictrope1887

1887 Encycl. Brit. XXII. 669/1 As regards isolated singularities, it will be sufficient to mention the point singularity of the conical point (or cnicnode) and the corresponding plane singularity of the conic of contact (or cnictrope).

This entry has not yet been fully updated (first published 1933; most recently modified version published online June 2018).

单词	cnicnode
释义	cnicnoden. /ˈnɪknəʊd/ Etymology: < Latin cnīcus, cnēcus safflower = Greek κνῆκος a plant of the thistle kind + Latin nodus knot, node. Mathematics. A conical point, a point where tangents form a cone of the second order. ΘΚΠ the world > relative properties > number > geometry > point > [noun] > of intersection or contact > of specific lines or curves cuspis1646 focus1656 point of reflection1674 umbilicus1704 cuspid1743 cusp1758 rhamphoid1814 biplanar1849 oscnode1852 tacnode1852 tangential of a point1858 cnicnode1869 uniplane1869 unode1869 1869 A. Cayley Coll. Math. Papers (1893) VI. 330 I take account of conical and biplanar nodes, or, as I call them, cnicnodes, and binodes. 1869 A. Cayley Coll. Math. Papers (1893) VI. 334 Consider a surface having the cnicnode C = 1, and the reciprocal surface having the cnictrope C′ = 1. 1870 A. Cayley Coll. Math. Papers (1894) VII. 246 There may be on the nodal curve points which, in the classification of the surfaces, must be counted as cnicnodes. Derivatives ˈcnictrope n. (see trope n.), the reciprocal of a cnicnode. ΘΚΠ the world > relative properties > number > geometry > point > [noun] > of intersection or contact > reciprocal of trope1875 cnictrope1887 1887 Encycl. Brit. XXII. 669/1 As regards isolated singularities, it will be sufficient to mention the point singularity of the conical point (or cnicnode) and the corresponding plane singularity of the conic of contact (or cnictrope). This entry has not yet been fully updated (first published 1933; most recently modified version published online June 2018). < n.1869
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