D defs.my
Entry 1 sense Webster, 1913

Gypseous

/(jĭp"sē̇*ŭs)/ · Gyp·se·ous · IPA
01 a. Resembling or containing gypsum; partaking of the qualities of gypsum.
  1. 1.
    Resembling or containing gypsum; partaking of the qualities of gypsum.