noun plural

Plan·​a·​ri·​idae ˌplan-ə-ˈrī-ə-ˌdē How to pronounce Planariidae (audio)
: a large family of small soft-bodied usually leaf-shaped flatworms of the order Tricladida that are almost all free-living in fresh water and often have well-developed eyespots see planaria

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Cite this Entry

“Planariidae.” Medical Dictionary, Merriam-Webster, Accessed 20 May. 2024.

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