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单词 serpoloid
释义

serpoloidn.

/ˈsəːpəlɔɪd/
Etymology: < Latin serpĕre to creep, serpens serpent n. + poloid adj. and n.
= herpolhode n.
ΘΚΠ
the world > relative properties > number > geometry > curve > [noun] > polholde or herpolhode
poloid1862
serpoloid1862
polhode1866
herpolhode1868
1862 A. Cayley Coll. Math. Papers (1891) IV. 572 A curve called ‘the Serpoloid’, which is the locus of the points with which the several points of the poloid come successively in contact with the tangent plane, and is a species of undulating curve.
This entry has not yet been fully updated (first published 1912; most recently modified version published online March 2018).
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n.1862
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