ultrastructural

/ˌʌltrəˈstrʌktʃərəl/
adjective
  1. Relating to the fine details of structure that can only be seen with an electron microscope.
    • The ultrastructural analysis of the cell revealed tiny organelles not visible with a standard microscope.
    • Scientists used ultrastructural imaging to study the arrangement of proteins in the muscle tissue.
    • The ultrastructural changes in the plant's leaves were caused by a virus.
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