subcellular

/ˌsʌbˈsɛljələr/
adjective
  1. Located or occurring within a cell, at a level smaller than a cell.
    • Subcellular processes such as protein synthesis are essential for life.
    • The scientist studied subcellular structures like mitochondria and ribosomes.
    • New imaging techniques allow us to observe subcellular details in living organisms.
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