| 释义 |
centroid Math.|ˈsɛntrɔɪd|
[f. centre (or its source) + -oid.]
1. = centrode. [In this sense introduced by Prof. A. B. W. Kennedy, 1876, on the analogy of cycloid and other names of curves, but subsequently abandoned for centrode.]
1876A. B. W. Kennedy tr. Reuleaux's Theoret. Kinemat. 1876S. Kens. Mus. Catal. No. 563 Sinoidic cams. Cardioids. With second disc and centroid. 1884Athenæum 13 Sept. 339/2 The author erroneously calls the loci of the instantaneous centre ‘centroids’, a term which has become appropriated in a very different sense. 1886A. B. W. Kennedy Mech. of Machin. 49 (note).
2. Centre of mass, or of gravity.
1882Minchin Unipl. Kinemat. 96 To find..the position of the Centroid (‘centre of gravity’) of any plane area. |