English edit

Etymology edit

From microscope +‎ -ical. Compare microscopic.

Pronunciation edit

Adjective edit

microscopical (comparative more microscopical, superlative most 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, section XVIII:
      I have observed in green Wood all those long Microscopical pores which appear in Charcoal perfectly empty of any thing but Air.