| 释义 |
▪ I. cylindroid, n.|ˈsɪlɪndrɔɪd|
[mod. ad. Gr. κυλινδρο-ειδής cylinder-like: see -oid.]
1. A figure resembling a cylinder; spec. one on an elliptical base, an elliptic cylinder.
1663Dary in Rigaud Corr. Sci. Men (1841) I. 99, I call them cylindroids (by which I mean) a solid contained under three surfaces. 1704J. Harris Lex Techn., Cylindroid, is a Solid Figure with Elliptical Bases, parallel, and alike situated. 1879Sir G. G. Scott Lect. Archit. I. 239 That the vaulting surfaces should be portions of cylinders or regular cylindroids.
2. A conoidal cubic surface of fundamental importance in the theory of screws and complexes.
1871Ball Theory of Screws in Trans. R. Irish Acad. 13 Nov.
▪ II. cylindroid, a.|sɪˈlɪndrɔɪd, ˈsɪlɪndrɔɪd|
[f. as prec.]
Resembling a cylinder; somewhat cylindrical in form.
1839–47Todd Cycl. Anat. III. 627/1 A cylindroid body. 1847–9Ibid. IV. 499/1 The bodies of the spermatozoa are..frequently..cylindroid. |