Dictionary Entry
counterillumination
nounFind the meaning of the word counterillumination, plus dictionary definition, pronunciation, thesaurus-style synonyms, antonyms, and related vocabulary.
1
Meaning
Dictionary meaning in a clear, student-friendly format.
the production of downward-facing bioluminescent light matching ambient illumination from above, eliminating an organism's silhouette to predators below
Example Sentence
Deep-sea squid use counterillumination to vanish from predators lurking below.
Usage Note
Use when discussing how midwater ocean animals hide by glowing to cancel out their shadow, making them nearly invisible from below.