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Webster 1913 Edition

Copperworm

Cop′per-wormˊ

,
Noun.
(Zool.)
(a)
The teredo; – so called because it injures the bottoms of vessels, where not protected by copper.
(b)
The ringworm.

Definition 2024

copperworm

copperworm

English

Noun

copperworm ‎(plural copperworms)

  1. The teredo.
  2. The ringworm.

Etymology

copper +‎ worm: the teredo used to damage the bottoms of vessels if they were not protected by copper.

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