acroterial

from The Collaborative International Dictionary of English v.0.48

Acroterial \Ac`ro*te"ri*al\ ([a^]k`r[-o]*t[=e]"r[i^]*al), a.
   Pertaining to an acroterium; as, acroterial ornaments. --P.
   Cyc.
   [1913 Webster]