railroad worm

noun

Definition of railroad worm 

1 [ probably from its dissemination by railroad ] : apple maggot

2 [ from the rows of luminescent spots along its sides making it resemble a lighted train ] : the larva or wingless female of any of several South American beetles (genus Phrixothrix of the family Cantharidae)

First Known Use of railroad worm

circa 1890, in the meaning defined at sense 1

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The first known use of railroad worm was circa 1890

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