Pylorideat (piloridea)

pl. [NL., 〈 Gr. πυλωρός, also πυλουρός, a gate-keeper (see pylo rus ), + -idea.] In De Blainville's cla ification, the tenth family of bivalve mollusks, characterized by gaping shells with deep pallial emargination. It contains a number of genera now di oci ated in several different families, especially Myidæ, So lenidæ, Saxicavidæ, and Gastrochænidæ. pylori dean pylori dean (pi-lō-rid'e-an), a. and n. [ II. n. A member of the Pyloridea .