from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun An igneous rock consisting chiefly of pyroxene and nepheline.
from The Century Dictionary.
- noun The name given by Rosenbusch to what had previously been generally designated us “nephelin-dolerite.” The difference between this rock and nephelin-basalt is exceedingly slight. See
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun geology a dark, finely crystalline rock of
volcanicorigin, being a mixture of nephelineand pyroxene
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun an igneous rock consisting of nepheline and pyroxene
Sorry, no etymologies found.
The predominant rock types on Shira and Mawenzi are trachybasalts; the later lava flows on Kibo show a gradual change from trachyandesite to nephelinite.