adj. Geol. 1 (of water) situated underground in the zone of saturation; ground water. 2 (of a volcanic eruption or explosion) caused by the heating and expansion of underground water.
[ Gk phrear phreatos well ]
PHREATIC
Meaning of PHREATIC in English
Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012