cleanroom

/K L IY1 N R UW0 M/
noun
  1. 1

    A room or environment that is controlled in such a way as to minimize airborne particulate matter, typically for the purpose of fabricating sensitive electronic or other devices.

  2. 2

    Being or relating to the method of copying a design by reverse engineering and then recreating it without infringing any copyrights.

  3. 3

    Being or relating to a software development process intended to produce software with a certifiable level of reliability.

Synonyms

Source: https://en.wiktionary.org/wiki/cleanroom