The Collaborative International Dictionary of English v.0.48:
sentential \sen*ten"tial\, a. 1. Comprising sentences; as, a sentential translation. --Abp. Newcome. [1913 Webster] 2. Of or pertaining to a sentence, or full period; as, a sentential pause. [1913 Webster]WordNet (r) 3.0 (2006):
sentential adj 1: of or relating to a sentence; "the sentential subject"