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[pich-blend] /ˈpɪtʃˌblɛnd/
noun, Mineralogy.
a massive variety of uraninite, occurring in black pitchlike masses: a major ore of uranium and radium.
Origin of pitchblende
1760-70; half translation, half adoption of German Pechblende. See pitch2, blende Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for pitchblende


a blackish mineral that is a type of uraninite and occurs in veins, frequently associated with silver: the principal source of uranium and radium. Formula: UO2
Word Origin
C18: partial translation of German Pechblende, from Pechpitch² (from its black colour) + blende
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for pitchblende

also pitch-blende, 1770, a loan-translation of German Pechblende; see pitch (n.2) + blende.

Online Etymology Dictionary, © 2010 Douglas Harper
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pitchblende in Science
A brown to black, often crusty, cubic mineral that is a principal ore of uranium. It is highly radioactive. Chemical formula: UO2.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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