subsizar

from The Collaborative International Dictionary of English v.0.48

Subsizar \Sub*si"zar\, n.
   An under sizar; a student of lower rank than a sizar.
   [Cambridge Univ. Eng.]
   [1913 Webster]

         Bid my subsizar carry my hackney to the buttery and
         give him his bever.                      --J. Fletcher.
   [1913 Webster]