- any of various small, red annelid worms, as the sludgeworm
- the wormlike red larva of various midges, esp. of a genus (Chironomus) that lays its eggs in water
See bloodworm in American Heritage Dictionary 4
- Any of various red, segmented marine worms of the genera Polycirrus and Enoplobranchus that have bright red bodies and are often used for bait.
- The freshwater larvae of certain midges that are red as a result of the high hemoglobin content of their blood.
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