Iceland spar Hear it!

Iceland spar definition

Iceland spar

a transparent, colorless calcite, found esp. in Iceland: it is used by opticians for making double-refracting prisms

Webster's New World College Dictionary Copyright © 2005 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

Comments
Improve this definition.
Do you have more to add? Share your linguistic knowledge or observation.
/Register to save your comments.