Definition of fissure vein
: a crack in the earth's crust filled with minerals deposited from aqueous solution including sometimes such adjacent rock as has been sufficiently mineralized to be mined as ore
Start your free trial today and get unlimited access to America's largest dictionary, with:
- More than 250,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Seen and Heard
What made you want to look up fissure vein? Please tell us where you read or heard it (including the quote, if possible).