pitchblende 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 brown to black, radioactive, massive form of uraninite: pitchblende is the chief ore of uranium and radium
Origin: calque of German pechblende ; from pech (; from Classical Latin pix), pitch plush blende, blende
pitchblende definition by American Heritage Dictionary
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
A massive variety of the mineral uraninite.
Origin: Partial translation of German Pechblende : Pech, pitch + Blende, blende; see blende.
pitchblende - Science Definition
A brown to black, often crusty, cubic mineral that is a principal ore of uranium. It is highly radioactive. Chemical formula: UO2.