Definition of ultracold in English:

ultracold

adjective

Physics
  • (of a neutron) having an energy of the order of 10−7 eV or less.

    • ‘THE FIELD of ultracold quantum gases is no longer in its infancy.’
    • ‘Arrays of ultracold atoms trapped by artificial crystals of light can be used in a wide variety of experiments in quantum physics’
    • ‘We naively thought that by ionizing the ultracold atoms in our trap, we would be running the CERN process in reverse.’
    • ‘In 2003 the last five of these groups produced ultracold molecules by causing pairs of fermionic atoms to associate with one another at a Feshbach resonance.’
    • ‘It's nifty to look into the chamber and see a clump of ultracold atoms floating there.’

Pronunciation:

ultracold

/ʌltrəˈkəʊld/