The Collaborative International Dictionary of English v.0.48:

Sapidity \Sa*pid"i*ty\, n. [Cf. F. sapidit['e].]
   The quality or state of being sapid; taste; savor;
   savoriness.
   [1913 Webster]

         Whether one kind of sapidity is more effective than
         another.                                 --M. S.
                                                  Lamson.
   [1913 Webster]

WordNet (r) 3.0 (2006):

sapidity
    n 1: the taste experience when a savoury condiment is taken into
         the mouth [syn: relish, flavor, flavour, sapidity,
         savor, savour, smack, nip, tang]
    2: a pleasant flavor [syn: sapidity, sapidness]