Definition of "nightcrawler" []

• An earthworm of the species Lumbricus terrestris, known for its large size and nocturnal surfacings (noun)
• More generally, any arbitrarily large earthworm, especially those favored in angling (noun)

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• "I was fishing with a nightcrawler on a single hook with a two foot leader and a swivel connecting to my main line."
• "Out here in AZ, it's difficult to find good nightcrawler grounds."
• "The night before a fishing trip we go out nightcrawler hunting."