gas phase; gaseous phase
Technical term in chemistry referring to the state of matter where a substance exists as a gas.
When water becomes a gas phase, it is called water vapor.
This reaction occurs in the gas phase.
vapor phase epitaxy; VPE
vapor-phase epitaxial growth; vapor-phase epitaxy; VPE
Compound of 気 (ki, 'gas') and 相 (sō, 'phase'). A straightforward technical term.