Definition

1. Noun:
   • Nuclear fusion at or near room temperature: "Cold fusion" refers to a hypothesized type of nuclear reaction that would occur at or close to room temperature, contrasting with the extremely high temperatures required for conventional "hot" fusion.
   • A disputed scientific claim: The term is strongly associated with a specific, controversial claim from 1989 by electrochemists Martin Fleischmann and Stanley Pons, which the broader scientific community has generally deemed to be erroneous or unreproducible.

Usage

• As a subject or object in a sentence: The term "cold fusion" is used to discuss the concept, the historical event, or ongoing fringe research.
  • The announcement of cold fusion caused a brief sensation in the scientific world.
  • Most physicists remain highly skeptical of claims about cold fusion.

Examples

• Noun:
  • The quest for cold fusion represents a dream of achieving limitless, clean energy.
  • After numerous failed attempts to replicate the results, interest in cold fusion waned significantly.
  • The journal published a paper on anomalous heat effects, which the authors cautiously suggested might be related to cold fusion.

Advanced Usage

• "Cold fusion research": Refers to the field of study, often on the margins of mainstream science, that investigates low-energy nuclear reactions (LENR).
  • A small community of scientists continues cold fusion research despite the controversy.
• "Cold fusion experiment": Describes a specific procedure attempting to demonstrate the phenomenon.
  • They meticulously documented their cold fusion experiment to allow for peer review.

Variants and Related Words

• Low-energy nuclear reaction (LENR): A more modern, general term sometimes used for phenomena similar to those originally described as cold fusion, often to distance the research from the 1989 controversy.
• Fusion (noun): The nuclear reaction where atomic nuclei combine, typically requiring immense heat and pressure, as in stars or hydrogen bombs.

Synonyms

• Room-temperature fusion: A descriptive synonym emphasizing the temperature condition.
• Fleischmann-Pons effect: A term specifically naming the claimed effect from the 1989 experiment.

Related Phrases

• To claim/discover cold fusion: The act of asserting that one has achieved the reaction.
  • Few researchers dare to claim cold fusion today due to the associated stigma.
• Cold fusion controversy/debate: Refers to the intense scientific and public disagreement following the 1989 announcement.
  • The cold fusion controversy is a classic case study in the sociology of science.

Noun

1. nuclear fusion at or near room temperatures; claims to have discovered it are generally considered to have been mistaken