Lewis & Short

dēsīdĕrātĭo, ōnis, f. [desidero],

  1. I. a desiring, longing for any thing; a missing (rare): voluptatum, * Cic. de Sen. 14, 47; plur. Vitr. 8 praef. fin.
  2. II. The question to be examined: relinquetur desideratio, quid, etc., Vitr. 2, 6, 4.