Ddd meaning

dēdēdē
A colorless, crystalline insecticide, (ClC6H4)2CHCHCl2, closely related to DDT but considered to be less toxic to animals; TDE.
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A feature of the public switched telephone network (PSTN) that allows a subscriber to dial a long distance telephone number directly, i.e., without the intervention of an operator. DDD was introduced by the Bell System in 1951, and is virtually ubiquitous today. See also long distance and PSTN.
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(organic chemistry) Dichlorodiphenyldichloroethane, an insecticide related to DDT.
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(telecommunications) Direct distance dialing, a network-provided service that enables non-local telephone calls to be made without operator assistance.
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Die-deterioration doubling, a common form of mint-made error on coins that results from degradation of the die used to strike the coin.
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A designation on prerecorded compact discs indicating a "full digital recording" (recorded, mixed and mastered in digital); compare AAD, ADD, DAD.
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