| combustion | <chemistry> The heat-producing reaction of a material with oxygen gas or other oxidant, often producing a flame. (09 Oct 1997) |
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| combustion air | The air fed to a fire to provide oxygen for combustion of fuel. It may be preheated before injection into a furnace. (05 Dec 1998) |
| combustion analysis | <technique> A method for determining the chemical composition of a compound by burning the compound under controlled conditions. Often used to determine the relative amounts of carbon and hydrogen in a compound. (09 Oct 1997) |
| combustion efficiency | Actual heat produced by combustion divided by the total heat potential of the fuel consumed (17 Dec 1998) |
| combustion equivalent | The heat value of a gram of carbohydrate or fat oxidised outside the body. (05 Mar 2000) |
| combustion gases | The gases released from a combustion process. (05 Dec 1998) |
| combustion reaction | <chemistry> The vigorous and exothermic reaction that takes place between certain substances, particularly organic compounds, and oxygen. (09 Jan 1998) |
| Comby | Jules, French paediatrician, 1853-1947. See: Comby's sign. (05 Mar 2000) |
| Comby's sign | <clinical sign> An early sign of measles, consisting in thin whitish patches on the gums and buccal mucous membrane, formed of desquamating epithelial cells. (05 Mar 2000) |