The Collaborative International Dictionary
Gypseous
Gypseous \Gyp"se*ous\ (j[i^]p"s[-e]*[u^]s), a. [L. gypseus. See Gypsum.] Resembling or containing gypsum; partaking of the qualities of gypsum.
Wiktionary
gypseous
a. Containing gypsum
Usage examples of "gypseous".
The superiority which is claimed for Burton ales is attributed to the use of well-water impregnated with sulphate of lime derived from the gypseous deposits of the district.