The Collaborative International Dictionary
Phreatic
Phreatic \Phre*at"ic\, a. [F. phr['e]atique, from Gr. ?, ?, a well.] (Geol.) Subterranean; -- applied to sources supplying wells.
Wiktionary
phreatic
a. (context geology English) Of or pertaining to ground water
WordNet
phreatic
adj. of or relating to ground water
Wikipedia
Phreatic
Phreatic is a term used in hydrology to refer to aquifers, in speleology to refer to cave passages, and in volcanology to refer to eruption type.
Usage examples of "phreatic".
Here, a phreatic passage, formed ages before by water under great pressure, cut laterally through the limestone cavern he was following.
Taking one final look at the pathetic remnants, Pendergast turned and followed the small river along the smooth curves of the phreatic passage.