English

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Etymology

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From Middle English [Term?], from Old English reġnwyrm, from Proto-Germanic [Term?]. Analysable as rain +‎ worm, because the worm has the habit of surfacing on top of the saturated soil after rainfall. Cognate with Dutch regenworm, Old High German reganwurm, whence German Regenwurm.

Noun

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rainworm (plural rainworms)

  1. An earthworm.