Definition of ultrashort in English:

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ultrashort

Pronunciation: /ˌəltrəˈSHôrt/

adjective

(Of radio waves) having a wavelength significantly shorter than that of the usual shortwaves, in particular shorter than 10 meters (i.e., of a VHF frequency above 30 MHz).
Example sentences
  • Although the ultrashort solitons described above have so far only been generated using a GaAs: InGaAs laser, nothing inherent to the technique restricts it to a specific material system.
  • According to the uncertainty principle, these ultrashort pulses would have a very wide spectrum of energies - with some photons in the gamma radiation range, having more than 1 MeV of energy.
  • Physicists have used ultrashort pulses of light to control the motion of electrons ejected from molecules and to produce electron beams just a few nanometres in length.

For editors and proofreaders

Syllabification: ul·tra·short

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