The Collaborative International Dictionary
Relativistic mass equation \Rel`a*tiv*ist"ic mass e*qua"tion\, n. (physics) an equation expressing the mass of an object as a function of its velocity: as the velocity v of an object increases, its mass m increases from its rest mass m0 according to the equation: m = m0/root 1 - v^{2/c^ 2} where c is the speed of light in a vacuum. If the speed of an object were to become equal to that of light, it can be seen that the mass would be infinite, from which it follows that nothing can accelerate up to or beyond the speed of light.
Note: The theoretical possibility that there are particles which always move faster than light cannot at present be disproved and is not denied by this equation; in such a case, the relativistic mass equation asserts that such particles can never decelerate to or below the speed of light. Such hypothetical particles are referred to as
Wiktionary
n. (plural of tachyon English)
Usage examples of "tachyons".
Thus if both bradyons and tachyons exist, each is confined to its own velocity region.
In increasing order of importance, they were matter, photons, tachyons, and packets of twinned particles that performed according to what human beings had called “the Einstein-Rosen-Podolsky Separability Phenomenon.
The only thing that distinguished tachyons from less exotic particles was that for tachyons the velocity of light was the lower speed limit, not the upper.
Even as a pattern of tachyons, traveling many times faster than light, it would take a long time to reach it.
Wan-To knew this to be true not merely because of the distance they had traveled, but because he observed that the tachyons had not been transmitted in a tight, economical beam.
It was a pity, he reflected, that he couldn’t use the extreme minimum-energy tachyons that were the fastest of all.
Even with the highest velocity tachyons that could do the job, say those moving at some large exponent of the speed of light, it would surely be a matter of some thousands of years.
Even with their shields defending them from the Calamarain’s lethal tachyons, he had no desire to linger in their grasp any longer than necessary.
It involves tiny particles called tachyons, particles that move always faster than light and do unpredictable things.
The pilot, or cybernetic monitor, has different uses for the tachyons, depending on whether they spin positively or negatively.
When only the separated, positive tachyons are used, we attain what we call 'A' impulse -- slower than light, but very fast.
If you tried to run an engine, like this, it would explode, because tachyons are also generated that spin negatively and they are anti-matter -- they annihilate positive matter.
Their field and that of the plus-rotating tachyons interact, releasing tremendous energy, and cause the basic drive.
The material begins to slow the generated tachyons to the point where separation becomes impossible.
Huge numbers of tachyons are created, having both positive and negative half-spin.