red wiggler
noun
plural red wigglers
: either of two North American red worms (Eisenia fetida or E. andrei) that are typically found in decaying organic matter and that are commonly cultivated for use in vermicomposting or as bait
There are a few other worm species that can be used for vermicomposting, but the red wigglers are an excellent choice, and they are readily available. Although worms can be purchased at bait shops, you want to make sure you are truly getting the Eisenia fetida species.—Laura Binford
Eisenia fetida is more commonly referred to as the "red wiggler." Red wiggler is … often also applied to another vermicomposting worm: Eisenia andrei. The two worms are very similar in appearance, biology, and habits.—prairiewormworks.ca
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Merriam-Webster unabridged
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