tachyon - WordReference.com Dictionary of English

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- - tachism
  - tachistoscope
  - tacho
  - tacho-
  - tachograph
  - tachometer
  - tachy-
  - tachycardia
  - tachygraphy
  - tachymeter
  - tachyon
  - tachyphylaxis
  - tacit
  - taciturn
  - tack
  - tackie
  - tackle
  - tackle block
  - tackle fall
  - tacky
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tachyon

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Concise Oxford English Dictionary © 2008 Oxford University Press:
tachyon /ˈtakɪɒn/

▶noun Physics a hypothetical particle that travels faster than light.

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