| 释义 |
strophoid Geom.|ˈstrɒfɔɪd|
[ad. F. strophoïde, f. Gr. στρόϕος twisted cord: see -oid.]
(See quot. 1880.) Hence stroˈphoidal a. and n.
1880W. W. Johnson in Amer. Jrnl. Math. III. 320 The term Strophoid has been applied by French writers to a cubic curve, of which the symmetrical form has been discussed by Dr. James Booth under the name of the Logocyclic Curve... I have ventured to use the word in a more extended signification, and define the strophoid as the locus of the intersection of two straight lines which rotate uniformly about two fixed points in a plane. 1883E. Barnes in Johns Hopkins Univ. Circular II. 145 A Note on the Strophoids. 1908Roy. Soc. Catal. Sci. Papers, Subj. Index I. 535/1 Strophoid [several refs. to foreign periodicals]. Ibid. 535/2 Strophoidal curves of 3rd degree. Ibid. 631/2 Logocyclic curve..or strophoid. Ibid. 632/2 Strophoidals. |