depleted uranium

British

noun

chem uranium containing a smaller proportion of the isotope uranium–235 than is present in the natural form of uranium; used in anti-tank weapons and other armaments

"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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depleted uranium

It would run on mixed-oxide fuel, made from plutonium recovered from used reactor fuel and surplus government stockpiles, mixed with depleted uranium.

From The Wall Street Journal ● May 27, 2026

Britain has also sent Ukraine ammunition made with depleted uranium.

From New York Times ● Sep. 26, 2023

A by-product of uranium enrichment, depleted uranium is used for ammunition because its extreme density gives rounds the ability to easily penetrate armor plating.

From Reuters ● Sep. 7, 2023

Uranium is a very dense metal, so depleted uranium can be used to reinforce the armour-plating on tanks.

From BBC ● Sep. 6, 2023

Their sharply angled bodies whisking back toward the depleted uranium cells, four cats appeared with shocking suddenness.

From Feline Red by Robert Sampson

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023