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cold fusion

cold fusion

5 8.9
A claimed way to make energy by joining parts of atoms at room temperature that most scientists do not accept
  • noun
  • /koʊld ˈfjuːʒən/
  • Specialized
translation icon : fusión fría
  • Certainly, I believe quite firmly the theoretical arguments that say cold fusion is impossible.
  • generation from cold fusion
  • cold fusion cells

So what is cold fusion and how would it change everything?

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Examples

  • Well, we all know that cold fusion has had, uh, a difficult childhood.

  • Yes, Rosi has developed an energy catalyzer, which utilizes cold fusion to produce heat energy.

  • So what is cold fusion and how would it change everything?

  • For one thing, we do know that cold fusion actually happens sometimes, and you can buy these devices.

  • When the first "cold fusion" stuff happened, he came to me to ask if this was possible.

    Blog text (16)
  • Um, I'm more interested in what questions you all have about cold fusion.

  • According to everything we know about the behavior of matter and nuclei, cold fusion is impossible.

    Academic text (1994)
  • For years after, the idea of cold fusion became synonymous with fringe science.

    Blog text (10)
  • Dr. Michael McKubre, an electrochemist at SRI International, has been engaging in cold fusion research for over 20 years.

    Blog text (14)
  • Researchers are investigating the possibility of cold fusion as a new energy source that could be safer and more efficient.

How Accepted

cold fusion
  • Specialized
5 8.9
claim
818 3.3
speculation
288 4.8

Surface Forms

cold fusion singular
cold fusions plural

Morphology

cold + fusion

The meaning 'nuclear fusion occurring at low or room temperature' follows directly from 'cold' (low temperature) modifying 'fusion' (the joining of nuclei); the compound is literal and compositional rather than idiomatic. There is no metaphorical shift or culture-specific sense, so a B1 learner who knows both constituents would be able to infer the MWE's meaning.

Etymology

Cold fusion came into the news in 1989 when two scientists said they had made atoms join at 'room temperature' instead of the very high heat fusion usually needs. The phrase links cold (no high heat) and fusion (joining of atoms), giving the image of big energy without heat, which is why the idea was exciting but later called 'unproven'.