Etymology First appears c. 1555, in a translation by Richard Eden. From Middle French fusion, from Latin fūsiōnem (the accusative of fūsiō), from fusus, past participle of fundō (“to pour; to melt”) (see also found). Doublet of foison.
The act of merging separate things, or the result thereof.
These tasks may be summarised as comprising the maintenance and improvement of railway services and facilities during a transitional period; the reorganising of systems of management and technical practices, so as to secure maximum efficiency and economy from the fusion of four major railway systems (using for these purposes all the resources and traditional skill of the former companies); and the building-up of a sense of common purpose and esprit de corps among a staff of more than 600,000 men and women.1951 April, D. S. Barrie, “British Railways: A Survey, 1948-1950”, in Railway Magazine, number 600, page 223:
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Natural sciences, Physical sciences, Physics A nuclear reaction in which nuclei combine to form more massive nuclei with the concomitant release of energy.
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Entertainment, Lifestyle, Music A style of music that blends disparate genres; especially different types of jazz and reggae.
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A style of cooking that combines ingredients and techniques from different countries or cultures
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The act of melting or liquefying something by heating it.
This Cryſtal is a pellucid fiſſile Stone, clear as Water or Cryſtal of the Rock, and without Colour; enduring a red Heat without loſing its tranſparency, and in a very ſtrong Heat calcining without Fuſion.a. 1728 (date written), Isaac Newton, “[The Third Book of Opticks.] [Qu[estion] 25. Are there not other original Properties of the Rays of Light, besides those already described?]”, in Opticks: Or, A Treatise of the Reflections, Refractions, Inflections and Colours of Light. […], 4th edition, London: […] William Innys […], published 1730, →OCLC, page 329:
From a vault in the green-blue ice, more or less perfectly formed each summer, the torrent issues, which represents the natural drainage of the valley, derived partly from land-springs, partly from fusion of the ice.1855, James David Forbes, “On Glaciers In General”, in Occasional Papers on the Theory of Glaciers, published 1859, page 239:
2 more examples
The upper limit of temperature is determined by the point at which fusion of the ore takes place, or often, for practical purposes, the temperature at which the ore softens and agglomerates.1951, Peter L. Paull, Frederick Burton Sellers, Method of Reducing Metal Oxides, US Patent 2740706:
Below the temperature of fusion of the solid phase, the growth rate of the solid/ liquid interface at low undercooling is affected mainly by undercooling.2002, Philippe Rousset, “Modeling Crystallization Kinetics of Triacylglycerols”, in Alejandro G. Marangoni, Suresh Narine, editors, Physical Properties of Lipids, →ISBN:
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Biology, Genetics, Medicine, Natural sciences, Sciences The result of the hybridation of two genes which originally coded for separate proteins.
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Biology, Cytology, Medicine, Natural sciences, Sciences The process by which two distinct lipid bilayers merge their hydrophobic core, resulting in one interconnected structure.
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Fiction, Literature, Media, Publishing The act of two characters merging into one, typically more powerful, being; or the merged being itself.
Etymology First appears c. 1555, in a translation by Richard Eden. From Middle French fusion, from Latin fūsiōnem (the accusative of fūsiō), from fusus, past participle of fundō (“to pour; to melt”) (see also found). Doublet of foison.