Adjective
ultrafine (comparative more ultrafine, superlative most ultrafine)
(of particles) Very fine
In 2010, an ultrafine, 10-micron fleece, from Windradeen, near Pyramul, New South Wales, won the Ermenegildo Zegna Vellus Aureum International Trophy. Source: Internet
It is nearly impossible for a practical air filter to completely remove all ultrafine particles from a dirt-laden airstream. Source: Internet
Secondhand e- cigarette aerosol (incorrectly called vapor by the industry) contains nicotine, ultrafine particles, and low levels of toxins that are known to cause cancer. Source: Internet
It is now common in Beijing for the concentration of ultrafine particles to reach 10 times the safe level set by the World Health Organization. Source: Internet
On Thursday, the concentration of ultrafine particles in Dongducheon, Gyeonggi Province north of Seoul, reached 255㎍/㎥, five times the normal level in the region. Source: Internet
The terms nanoparticles and ultrafine particles (UFP) often are used synonymously although UFP can reach into the micrometre range. Source: Internet