Definition of rudite in US English:

rudite

(also rudyte)

noun

Geology
  • Any clastic sedimentary rock composed of grains coarser than sand, i.e. greater than 2 mm (approx. 1/10 inch) in diameter.

Origin

Early 20th century; earliest use found in Amadeus William Grabau (1870–1946). From classical Latin rūdus + -ite.

Pronunciation

rudite

/ˈruːdʌɪt/