spherograph

名词 n.
中文释义

英文释义

名词 n.
  1. An instrument for facilitating the practical use of spherics in navigation and astronomy, constructed of two cardboards containing various circles, turning upon each other in such a manner that any possible spherical triangle may be readily found, and the measures of the parts read off.

词形变化

spherographs plural

词源

From sphero- + -graph.
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