/nɛfɛlˈɪnɪk/ (nĕ-fel-IN-ik)

Definitions

1. adjective

relating to nepheline, a mineral, or its chemical composition

“The nephelinic rocks in the region have been a subject of geological research.”

2. noun

a type of volcanic rock rich in nepheline or composed mainly of nepheline

“The nephelinic rocks found in the region are a significant source of raw materials.”