acroterial,a.|ˌækrəʊˈtɪərɪəl| [f. L. acroteri-um + al1.] Pertaining to, or having the character of, an acroterium. 1708View of Lond. I. 96/2 The Acroterial Pinnacles are of the Gothic order.1833Pen. Cycl. I. 100 The bases or pedestals on which the acroterial ornaments are placed.