Definition of allivalite
: a plutonic rock composed of anorthite and olivine in approximately equal amounts
Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.
Join MWU now and get access to America’s largest dictionary, with:
- 300,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Origin and Etymology of allivalite
Allival Hill, Isle of Rum, Inner Hebrides, Scotland, its locality + English -ite
First Known Use: 1903
Seen and Heard
What made you want to look up allivalite? Please tell us where you read or heard it (including the quote, if possible).