Source : Webster's Revised Unabridged Dictionary (1913)

sentential \sen*ten"tial\, a.
   1. Comprising sentences; as, a sentential translation. --Abp.
      Newcome.

   2. Of or pertaining to a sentence, or full period; as, a
      sentential pause.

Source : WordNet®

sentential
     adj : of or relating to a sentence; "the sentential subject"