The Collaborative International Dictionary of English v.0.48:

Jugal \Ju"gal\, a. [L. jugalis, fr. jugum yoke.]
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   1. Relating to a yoke, or to marriage. [Obs.]
      [1913 Webster]

   2. (Anat.) Pertaining to, or in the region of, the malar, or
      cheek bone.
      [1913 Webster]