ros·​tru·​lum | \ -ləm\
plural rostrula\ -​lə \

Definition of rostrulum

: a small rostrum specifically : the proboscis of a flea

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First Known Use of rostrulum

1826, in the meaning defined above

History and Etymology for rostrulum

New Latin, from Latin rostrum beak + -ulum

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The first known use of rostrulum was in 1826

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to move or proceed with twists and turns

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