Definition of medal of creation in English:

medal of creation

noun

historical
  • (A rhetorical term for) a fossil, likened in appearance to an image stamped in relief on a medal and hence taken as commemorating a period in the history of the earth.

Origin

Early 19th century; earliest use found in James Parkinson (1755–1824), surgeon and palaeontologist. After post-classical Latin nummus memorialis.