Meaning of oculus mundi in English:

oculus mundi

Pronunciation /ˌɒkjʊləs ˈmʊndi/

noun

historical
  • A variety of opal which becomes transparent on absorbing water.

Origin

Mid 17th century. From classical Latin oculus eye + mundī, genitive singular of mundus world. Compare French oculus mundi, and later eye of the world.