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envelope |
Also found in: Dictionary/thesaurus, Medical, Financial, Wikipedia, Hutchinson | 0.04 sec. |
envelope(1) A range of frequencies for a particular operation. envelope 1. Biology any enclosing structure, such as a membrane, shell, or skin 2. the bag enclosing the gas in a balloon 3. Maths a curve or surface that is tangent to each one of a group of curves or surfaces 4. Electronics the sealed glass or metal housing of a valve, electric light, etc. 5. Telecomm the outer shape of a modulated wave, formed by the peaks of successive cycles of the carrier wave |
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