[医] 透明石膏; 亚硒酸盐

Gypsum \Gyp"sum\ (j[i^]p"s[u^]m), n. [L. gypsum, Gr. gy`psos;
cf. Ar. jibs plaster, mortar, Per. jabs[imac]n lime.] (Min.)
A mineral consisting of the hydrous sulphate of lime
(calcium). When calcined, it forms plaster of Paris.
{Selenite} is a transparent, crystalline variety;
{alabaster}, a fine, white, massive variety.


Selenite \Sel"e*nite\, n. (Chem.)
A salt of selenious acid.


Selenite \Sel"e*nite\, n. [L. selenites, Gr. ???? (sc. ???),
from selh`nh the moon. So called from a fancied resemblance
in luster or appearance to the moon.] (Min.)
A variety of gypsum, occuring in transparent crystals or
crystalline masses.