The Collaborative International Dictionary of English v.0.48:

Tingent \Tin"gent\, a. [L. tingens, p. pr. of tingere to tinge.
   See Tinge.]
   Having the power to tinge. [R.]
   [1913 Webster]

         As for the white part, it appears much less enriched
         with the tingent property.               --Boyle.
   [1913 Webster]