metamerism

/məˈtæməˌrɪzəm/
noun
  1. The condition of having a body composed of a series of similar segments (metameres).
    • Metamerism is a key feature of annelids like earthworms and leeches.
    • In biology class, we learned that metamerism helps some animals survive injury by isolating damage to one segment.
    • The evolution of metamerism allowed animals to develop more complex body systems.
  2. In color science, the phenomenon where two colors appear the same under one light source but different under another.
    • Metamerism can cause problems when matching fabric colors under fluorescent lights.
    • The designer used a special lamp to avoid metamerism in the showroom.
    • Painters must watch out for metamerism, because two colors that match in the store may look different at home.
Synonyms
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