American Heritage® Dictionary of the English Language, Fourth Edition
- n. A widespread colorless, white, or yellowish mineral, CaSO4·2H2O, used in the manufacture of plaster of Paris, various plaster products, and fertilizers.
Century Dictionary and Cyclopedia
- n. Native hydrous sulphate of calcium, a mineral usually of a white color, but also gray, yellow, red, and when impure brown or black. It is soft and easily scratched; the crystalline varieties, called
selenite, are generally perfectly transparent, and cleave readily, yielding thin flexible folia. The crystals are frequently twinned, and often have an arrowhead form. The massive varieties are fibrous (satin-spar), foliated, lamellar-stellate, granular to impalpable. The fine-grained pure white or delicately colored variety is called alabaster, and is used for ornamental purposes; the impure earthy kind, when reduced to the anhydrous form by heat, is called plaster of Paris, and is used extensively for making molds, etc. (See plaster.) Gypsum ground to a powder is used as a fertilizer.
GNU Webster's 1913
- n. (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.
- n. a common white or colorless mineral (hydrated calcium sulphate) used to make cements and plasters (especially plaster of Paris)
- Latin gypsum, from Ancient Greek γύψος. (Wiktionary)
- Middle English gipsum, from Latin gypsum, from Greek gupsos, probably of Semitic origin; akin to Arabic jibs, jiṣṣ, jaṣṣ, from Akkadian gaṣṣu. (American Heritage® Dictionary of the English Language, Fourth Edition)
“In the same manner as sulphur and coal belong to periods of formation very remote from each other, the sal-gem is also found sometimes in transition gypsum, * sometimes in the Alpine limestone, * sometimes in a muriatiferous clay lying on a very recent sandstone, * and lastly, sometimes in a gypsum* posterior to the chalk.”
“For its pale translucence, this form of gypsum is known as selenite, named after Selene, the Greek goddess of the moon.”
“Apparently the technique was to encase the body in gypsum so that when it decayed it left a perfect cast of the corpse behind.”
“Thanks for your time! edit: i remember also coming across the word gypsum boards for these? but im not sure if they are gypsum boards”
“The preferred coagulant among major tofu manufacturers is calcium sulfate, aka gypsum, which is the main ingredient in plaster-of-Paris.”
“Builders have been hit by a rash of lawsuits from homeowners, who complain that defective drywall, also known as gypsum board, imported from China during the housing boom is generating sulfurous odors, corrodes metal and, in some case, causes health problems.”
“The defective drywall, also known as gypsum board, was imported from China from about 2004 until 2007 to fill a shortage during the housing boom.”
“Chinese-made drywall, also known as gypsum or wallboard, has been under federal investigation because of complaints that the drywall emits sulfide fumes.”
“Calcium-Sulphate, also known as gypsum, has a small solubility tolerance.”
“Drywall, also called gypsum board, is typically made in the United States or imported from Mexico or Canada.”
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Looking for tweets for gypsum.