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Medical Definition of Hymenostomatida
1. An order of ciliate protozoa. Characteristics include a ventral oral area and a well-defined buccal cavity. It comprises three suborders: tetrahymenina, ophryoglenina, and peniculina. (12 Dec 1998)
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1. An order of ciliate protozoa. Characteristics include a ventral oral area and a well-defined buccal cavity. It comprises three suborders: tetrahymenina, ophryoglenina, and peniculina. (12 Dec 1998)