The Collaborative International Dictionary of English v.0.48:

Cosmolabe \Cos"mo*labe\ (k?z"m?-l?b), n. [Gr. ko`smos the world
   + lamba`nein to take: cf. F. cosmolade.]
   An instrument resembling the astrolabe, formerly used for
   measuring the angles between heavenly bodies; -- called also
   pantacosm.
   [1913 Webster]