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| the property of a fluid that resists the force tending to cause the fluid to flow; the measure of the extent to which a fluid possesses this property |
| a device that produces a nearly parallel, monochromatic, coherent beam of light by exciting atoms to a higher energy level and causing them to radiate |
| linear accelerator | |
| —n | |
| Sometimes shortened to: linac an accelerator in which charged particles are accelerated along a linear path by potential differences applied to a number of electrodes along their path | |
linear accelerator n.
An electron, a proton, or a heavy-ion accelerator in which the paths of the particles accelerated are essentially straight lines rather than circles or spirals.
A device that produces high energy photons (x-rays) on charged particles for use in radiation therapy.
| linear accelerator
A type of particle accelerator that accelerates charged subatomic particles, such as protons and electrons, in a straight line by means of alternating negative and positive impulses from electric fields. Linear accelerators were largely supplanted by cyclotrons and other architectures that require less path length to achieve the same or higher particle velocities. See Note at particle accelerator. |