isomorph

/ˈaɪsəˌmɔrf/
noun
  1. Something that has the same form, structure, or function as something else, especially in mathematics, chemistry, or biology.
    • In graph theory, an isomorph of a triangle is any three points connected in a loop.
    • Biologists found that the wing structure of the bat is an isomorph of the human hand.
    • The chemist identified an isomorph of the crystal that shared the same atomic arrangement.
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