Definition of nephelinitic in US English:

nephelinitic

adjective

Geology
  • Containing, resembling, or characteristic of nephelinite.

Origin

Early 20th century; earliest use found in Joseph Iddings (1857–1920). From nephelinite + -ic; compare -itic.

Pronunciation

nephelinitic

/ˌnɛfəlɪˈnɪtɪk/