enhydros

Etymology
From.

Noun

 * 1) A geode of chalcedony containing trapped water.
 * 2) * 1875: William Whitaker, B.A., F.G.S., ed, The Geological Record for 1874: An Account of Works on Geology, Minerology, and Palæontology published during the year
 * ... the liquid obtained from the cavities of a specimen of enhydros, or "water-stone." It consists of clear water containing in solution a small proportion of certain salts, apparently the chlorides and sulphates of sodium, magnesium, and calcium.

Translations

 * French:
 * German: Enhydros