ˈ ̷ ̷ ̷ ̷ ̷ ̷ˌ ̷ ̷- noun
: any of several marine bivalve mollusks (genus Brechites ) having small valves consolidated with a capacious calcareous tube which encases the entire animal and is closed at the anterior end by a convex disk perforated by many pores like the nozzle of a watering pot ; also : the shell of such a mollusk