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Related to speed: Speed test
The magnitude of velocity without regard to direction. Compare: velocity.
Slang A stimulant drug, especially amphetamine or methamphetamine.
v. sped (spĕd) or speeded, speeding, speeds
Slang To be under the influence of a stimulant drug.
Etymology: AS, spedan, to hasten
1 the rate of change of position with time. Compare velocity.
2 See amphetamines.
3 a reciprocal of the amount of radiation used to produce an image with various components of an x-ray imaging system, such as screens, film, and image intensifiers. There is often a tradeoff between radiation dose to the patient and the overall image quality. Thus a system using little radiation is "fast," whereas one requiring more radiation is "slow."
4 the amount of exposure of film to light or x-rays needed to produce a desired image. X-ray film speed usually is indicated as the reciprocal of the exposure in roentgens necessary to produce a density of 1 above the base and fog levels. See also fogged film fault.
Vox populi Rapidity of movement
SPEEDCardiology A clinical trial–Strategies for Patency Enhancement in the Emergency Department
speedDrug slang A street synonym for amphetamine, which may also refer to methamphetamine and crack
The magnitude of velocity without regard to direction.