"optical instrument which by means of a lens or lenses magnifies and renders visible minute objects or details of visible bodies," 1650s, from Modern Latin microscopium, literally "an instrument for viewing what is small;" see micro- + -scope. The dim southern constellation Microscopium was among those introduced by La Caille in 1752.
suffix indicating state, condition, or quality; also activity or the result of it (as in victory, history, etc.), via Anglo-French and Old French -é, from Latin -ia, Greek -ia, from PIE *-a-, suffix forming abstract or collective nouns. It is etymologically identical with -ia and the second element in -cy, -ery, -logy, etc.
<a href="https://www.etymonline.com/word/microscopy">Etymology of microscopy by etymonline</a>
Harper, D. (n.d.). Etymology of microscopy. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/microscopy