Spadella
noun
Spa·del·la
\spəˈdelə\
Definition of Spadella
: a genus of planktonic marine animals (phylum Chaetognatha) that includes arrow worms resembling those of the genus Sagitta but having a broader body and only one pair of lateral fins
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Origin and Etymology of spadella
New Latin, probably from Late Latin spada sword (alteration of Latin spatha broad sword) + New Latin -ella
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