counterilluminate

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English[edit]

Etymology[edit]

counter- +‎ illuminate

Verb[edit]

counterilluminate (third-person singular simple present counterilluminates, present participle counterilluminating, simple past and past participle counterilluminated)

  1. (of a fish) To use photophores on the underside of the body so as to hide a dark silhouette that would otherwise be seen from below by predators
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