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silverfish

/ˈsɪlvə(ɹ)fɪʃ/ noun

noun Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about silverfish at Wordnik → Where our words come from →

  1. Silver-grey wingless insect found in houses feeding on book bindings and starched clothing.
  2. A silvery variety of Carassius auratus.

Origin

From silver + fish: from its appearance, in the case of the insect.

From Wiktionary, via Kaikki.org (CC BY-SA)