| 释义 |
sphero·graph
\ˈsfirəˌgraf, -fer-, -grȧf\ noun
Etymology: sphaer- + -graph
1. : two cardboards used especially in navigation and astronomy, containing various circles, and turning upon each other in such a manner that any possible spherical triangle may be readily found and the measure of the parts read off by inspection
2. : a disk ruled with meridians and parallels in stereographic projection for the solution of problems in spherics |