Dimyaria

Definitions

  • Webster's Revised Unabridged Dictionary
    • n. pl Dimyaria (Zoöl) An order of lamellibranchiate mollusks having an anterior and posterior adductor muscle, as the common clam. See Bivalve.
    • ***
Century Dictionary and Cyclopedia
    • dimyaria A general name for those bivalves whose shells are closed by two adductor muscles, distinct and widely removed from each other, as in the mussel or clam. The two muscular attachments are always visible on the inside of the shell, constituting the impressions called ciboria. These muscles are anterior and posterior. The Dimyaria include by far the largest number of bivalves, such as the clams, cockles, etc. Bimusculosa is a synonym.
    • dimyaria A group or branch of Nemertini in which the dermal musculature consists of an external coat of circular muscles and an internal coat of longitudinal muscles. It includes the anoplous forms belonging to the orders Protonemertini, Mesonemertini, and Metanemertini. Contrasted with *Trimyaria.
    • ***

Etymology

Webster's Revised Unabridged Dictionary
NL., fr. Gr. = + to close