| 释义 |
polhode Geom.|ˈpɒlhəʊd|
[mod. f. Gr. πόλος pole + ὁδός way, path (Poinsot 1852).]
The non-plane curve traced on the surface of an ellipsoid with fixed centre by its point of contact with a fixed plane on which it rolls, as in the revolution of a top. Cf. herpolhode.
1868E. J. Routh Rigid Dynamics 329 The point of contact of the ellipsoid with the plane on which it rolls traces out two curves, one on the surface of the ellipsoid, and one on the plane. The first of these..is called the polhode. 1882Campbell & Garnett Life J. C. Maxwell 500 The curve which the extremity of the axis of rotation describes on the invariable plane is called a herpolhode, while that which it describes on the surface of the ellipsoid is called a polhode. |