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tentillum

noun ten·til·lum \ ten‧ˈtiləm \

Definition of tentillum

plural tentilla \-lə\
: a branch of a tentacle; especially : one of the contractile branches that are rich in nematocysts and that occur on the tentacles of various siphonophores

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Origin and Etymology of tentillum

New Latin, from Latin tentare to feel + -illum, diminutive suffix

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