Definition of yellowcake in English:

yellowcake

Pronunciation /ˈyelōˌkāk/ /ˈjɛloʊˌkeɪk/

noun

  • 1Impure uranium oxide obtained during processing of uranium ore.

    ‘The natural uranium and yellowcake stored at Tuwaitha was not nuclear bomb grade material.’
    • ‘The process of uranium enrichment is incredibly difficult and energy intensive. Thousands of tons of uranium ore should be processed into powder form called yellowcake.’
    • ‘Included in those facilities, say analysts, is a process line for turning uranium ore into yellowcake, the first step in the process towards enriching it into weapons-grade material.’
    • ‘The problem of uranium-contaminated groundwater dates back to the Cold War when mines and mills throughout the United States produced millions of tons of uranium oxide, or yellowcake, to build nuclear bombs.’
  • 2yellow cakeUS A vanilla-flavored cake having a pale yellow color from the egg yolks and butter in the recipe.

    • ‘spread icing over one layer of a yellow cake’

Origin

1940s so named because the oxide is obtained as a yellow precipitate.