Source : Webster's Revised Unabridged Dictionary (1913)

Jumelle \Ju`melle"\, a. [F., fem. of jumeau, fr. L. gemellus.
   Cf. {Gemel}, a.]
   Twin; paired; -- said of various objects made or formed in
   pairs, as a binocular opera glass, a pair of gimmal rings,
   etc.

Jumelle \Ju`melle"\, n.
   A jumelle opera glass, or the like.