selenite

noun

1. (countable, uncountable)A soft, glassy form of gypsum (chemical formula CaSO₄·2H₂O).

   “I followed them to my study, and found lying on my writing-table still, with the selenite paper-weight upon it, the sheet of work I had left on the afternoon of the opening of the cylinder.”

   “Glass windows replaced the old tiny windows of selenite (crystallized gypsum), and stovepipe replaced adobe chimneys.”

2. (countable, uncountable)The anion SeO₃²⁻ derived from selenous acid; any salt or ester of selenous acid.
3. Synonym of Lunarian (“inhabitant of the Moon”).

   “My first impression was of some clumsy quadruped with lowered head. Then I perceived it was the slender pinched body and short and extremely attenuated bandy legs of a Selenite, with his head depressed between his shoulders.”

adj

1. (not-comparable)Pertaining to the inhabitants of Luna (Lunarians/Selenites).

   “a Selenite colony”

   “"Come, Diana [a dog]," said he; "come, my girl! thou whose destiny will be marked in the cynegetic annals; […] thou who art rushing into interplanetary space, and wilt perhaps be the Eve of all Selenite dogs! come, Diana, come here."”