“hypotrochoid”的英文意思_释义_用法

单词

hypotrochoid

释义

hypotrochoid Geom.|h(a)ɪpəʊˈtrəʊkɔɪd, h(a)ɪˈpɒtrəʊkɔɪd|
[f. hypo- 2 + trochoid.]
The curve described by a point rigidly connected with the centre of a circle which rolls on the inside of another circle.
1843Penny Cycl. XXV. 282/1 A class [of curves] called..hypotrochoids, of which one particular case is the hypocycloid.1879Thomson & Tait Nat. Phil. I. i. §94 When the tracing point is not in the circumference, we have Epitrochoids and Hypotrochoids.
Hence hypotroˈchoidal a., of the form of, or pertaining to, a hypotrochoid.
1843Penny Cycl. XXV. 283/1 When the convexities are opposed, the trochoidal system is called epi-trochoidal, and when concavity fits convexity, hypo-trochoidal.

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