noun pla·nar·ia \plə-ˈner-ē-ə\
plural pla·nar·ia also pla·nar·ias

Definition of PLANARIA

:  any of a genus (Planaria) of 2-eyed planarian worms; broadly :  planarian

Origin of PLANARIA

New Latin, from feminine of Late Latin planarius lying on a plane, from Latin planum plane
First Known Use: 1855


noun pla·nar·ia \plə-ˈnar-ē-ə, -ˈner-\   (Medical Dictionary)

Medical Definition of PLANARIA

capitalized :  the type genus of the family Planariidae comprising planarian worms having two eyes
:  any worm of the genus Planaria; broadly :  planarian


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