yellowcake

or yel·low cake

[ yel-oh-keyk ]
/ ˈyɛl oʊˌkeɪk /

noun

a processed oxide of uranium, U3O8, extracted and concentrated from uranium ore: used as the raw material for commercial nuclear materials, especially fuel elements in nuclear reactors.

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Origin of yellowcake

First recorded in 1945–50; yellow + cake
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for yellowcake

yellow cake

noun

informal semirefined uranium ore
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