|a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.|
|a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.|
|1.||the process of burning|
|2.||any process in which a substance reacts with oxygen to produce a significant rise in temperature and the emission of light|
|3.||a chemical process in which two compounds, such as sodium and chlorine, react together to produce heat and light|
|4.||a process in which a compound reacts slowly with oxygen to produce little heat and no light|
|[C15: from Old French, from Latin combūrere to burn up, from com- (intensive) + ūrere to burn]|
combustion com·bus·tion (kəm-bŭs'chən)
The process of burning.
A chemical change, especially oxidation, accompanied by the production of heat and light.