Verb
To reduce (as a liquid) to a fine spray or vapor; to atomize.
Source: Webster's dictionaryIt works by vibrating a metal plate at ultrasonic frequencies to nebulize (sometimes incorrectly called "atomize") the water. Source: Internet
The ultrasonic pressure waves nebulize not only the water but also materials in the water including calcium, other minerals, viruses, fungi, bacteria, citation and other impurities. Source: Internet