| 释义 |
poloid, n. Geom.|ˈpəʊlɔɪd|
[f. Gr. πόλος axle, pole n.2 + -oid.]
= polhode (which is now the usual term). Also attrib. or adj. in poloid curve.
1862Cayley Coll. Math. Papers IV. 571 The ‘Extrait’..establishes also the notions of the Poloid and Serpoloid curves. Ibid. 572 The pole of the instantaneous axis describes on the ellipsoid a certain curve, the ‘Poloid’, which is the locus of all the points for which the perpendicular on the tangent plane has a given constant value. |