The Collaborative International Dictionary of English v.0.48:

Schneiderian \Schnei*de"ri*an\, a. (Anat.)
   Discovered or described by C. V. Schneider, a German
   anatomist of the seventeenth century.
   [1913 Webster]

   Schneiderian membrane, the mucous membrane which lines the
      nasal chambers; the pituitary membrane.
      [1913 Webster]