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单词 crunode
释义 crunode Geom.|ˈkruːnəʊd|
[Irreg. f. L. crux cross + node.]
A point on a curve where it crosses itself; a node with two real tangents.
1873Salmon Higher Plane Curves 22 In the first case the tangents are both real..such a point is termed a crunode.
Hence cruˈnodal a., having a crunode.
1873Salmon Higher Plane Curves 126 Nodal cubics may obviously be subdivided into crunodal and acnodal.
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