noun

• 1Mineralogy
  Originally: (more fully "quartz-resinite") a siliceous material of resinous or opaline appearance. In later use: fossilized resin, especially as a constituent (maceral) of coal, in which it typically occurs as elliptical or spindle-shaped bodies.

• 2Chemistry
  historical, rare A synthetic resin produced by the condensation of phenol and formaldehyde. Compare "resite".