Definition of retinite in US English:

retinite

noun

Geology
  • Any of a large group of fossil resins occurring in deposits of lignite, peat, etc., and (unlike Baltic amber) containing little or no succinic acid.

Origin

Early 19th century (in an earlier sense). From ancient Greek ῥητίνη resin + -ite.

Pronunciation

retinite

/ˈrɛtɪnʌɪt/