Webster’s Revised Unabridged Dictionary · 1913
Decastyle
Dec′a·style (dĕk′ȧ·stīl), a. [Gr. δεκάστυλος; δέκα ten + στύλος a column.] (Arch.) Having ten columns in front; — said of a portico, temple, etc. — n. A portico having ten pillars or columns in front.