c-decay

noun

The discredited theory that the speed of light has decreased over time, proposed by creationists in order to support the belief that the universe is a few thousand years old even though there are objects visible today that are billions of light years away (whereas a constant speed of light would indicate that the universe is billions of years old and so contradict this belief).

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Meanings

nounc-decay (uncountable)
  1. uncountablecreationismThe discredited theory that the speed of light has decreased over time, proposed by creationists in order to support the belief that the universe is a few thousand years old even though there are objects visible today that are billions of light years away (whereas a constant speed of light would indicate that the universe is billions of years old and so contradict this belief).

Origin

From c (“the symbol used in physics for the speed of light”) + decay.

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Cite this entry
APA

c-decay. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/c-decay

MLA

“c-decay.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/c-decay. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “c-decay,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/c-decay.

Source: c-decay on Wiktionary, CC BY-SA 4.0.