flint glass definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a hard, bright glass containing lead oxide and having a high index of refraction, used for lenses, crystal, etc.
flint glass definition by American Heritage Dictionary
A soft, fusible, lustrous, brilliant lead-oxide optical glass with high refraction and low dispersion. Also called lead glass.