watering–pot shell

noun

Definition of watering–pot shell

  1. :  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

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