Source : Webster's Revised Unabridged Dictionary (1913)

Insitency \In*si"ten*cy\, n. [Pref. in- not + L. sitiens, p. pr.
   of sitire to be thirsty, fr. sitis thirst.]
   Freedom from thirst. [Obs.]

         The insitiency of a camel for traveling in deserts.
                                                  --Grew.