microscopical
Adjective

microscopical

  1. Pertaining to the microscope; achieved by means of a microscope. [from 17th c.]
  2. (now, rare) Only visible by means of a microscope; very small, microscopic. [from 17th c.]
    • 1665, Robert Hooke, Micrographia, XVIII:
      I have observed in green Wood all those long Microscopical pores which appear in Charcoal perfectly empty of any thing but Air.



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