Noun

(en noun)

A product consisting of a liquid which has had other ingredients steeped in it to extract useful qualities.

An extract of rooibos and chamomile makes a refreshing infusion .

The act of steeping or soaking a substance in liquid so as to extract medicinal or herbal qualities.

The act of installing a quality into a person.

* 1602 : , act V scene 1

[...] but in the verity of extolment / I take him to be a soul of great article and his infusion / of such dearth and rareness as, to make true diction of / him, his semblable in his mirror, and who else would / trace him, his umbrage, nothing more.

(obsolete) The act of dipping into a fluid.

Noun

The merging of similar or different elements into a union.

(physics) A nuclear reaction in which nuclei combine to form more massive nuclei with the concomitant release of energy.

(music) a style of music that blends disparate genres; especially types of jazz.

A style of cooking that combines ingredients and techniques from different countries or cultures

The act of melting or liquefying something by heating it.

* {{quote-book, 1855, James David Forbes, chapter=On Glaciers In General, year_published=1859, Occasional Papers on the Theory of Glaciers citation

, passage=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.}}

* {{quote-us-patent, 1951, Peter L. Paull & Frederick Burton Sellers, Method of Reducing Metal Oxides, 2740706 citation

, passage=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.}}

* {{quote-book, 2002, Philippe Rousset, chapter=Modeling Crystallization Kinetics of Triacylglycerols, Physical Properties of Lipids, editors=Alejandro G. Marangoni & Suresh Narine, isbn=0824700058 citation

, passage=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.}}

(lb) The result of the hybridation of two genes which originally coded for separate proteins.

(lb) The process by which two distinct lipid bilayers merge their hydrophobic core, resulting in one interconnected structure.