n. [ 2d uro- + Gr. &unr_; a pillar. ] (Anat.) A styliform process forming the posterior extremity of the vertebral column in some fishes and amphibians. [ 1913 Webster ]
a. [ L. prostylus, Gr. &unr_;; &unr_; before + &unr_; pillar, column: cf. F. prostyle. ] (Arch.) Having columns in front. --