Source : Webster's Revised Unabridged Dictionary (1913)

Gemel \Gem"el\, a. [OF. gemel twin, F. jumeau, L. gemellus twin,
   doubled, dim. of geminus. See {Gemini}, and cf. {Gimmal}.]
   (Her.)
   Coupled; paired.

   {Bars gemel} (Her.), two barrulets placed near and parallel
      to each other.