The Collaborative International Dictionary of English v.0.48:

Hemina \He*mi"na\, n.; pl. Hemin[ae]. [L., fr. Gr. ?.]
   1. (Rom. Antiq.) A measure of half a sextary. --Arbuthnot.
      [1913 Webster]

   2. (Med.) A measure equal to about ten fluid ounces.
      [1913 Webster]