Iceland spar

noun

Definition of Iceland spar

: a birefringent transparent colorless variety of calcite

First Known Use of iceland spar

1771

in the meaning defined above

See Words from the same year
NEW! Time Traveler

Seen and Heard

What made you want to look up Iceland spar? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!