| 单词 | tacnode-cusp |
| 释义 | > as lemmasˈtacnode-ˈcusp ˈtacnode-ˈcusp n. the singularity of a curve which arises when a cusp and an immediately following tangency of the two branches coalesce. ΘΚΠ the world > relative properties > number > geometry > point > [noun] > on a curve first polar1836 umbilic1843 spinode1852 stationary point1856 ineunt1859 triple point1872 tacnode-cusp1873 1873 G. Salmon Treat. Higher Plane Curves (1879) 207. < as lemmas |
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