Suctoria
noun plural
Suc·to·ria
ˌsək-ˈtōr-ē-ə
: a class of complex protozoans (phylum or subphylum Ciliophora) which in the mature form are fixed to the substrate, lack locomotor organelles or a mouth, and obtain food through specialized suctorial tentacles
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Merriam-Webster unabridged
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