| 释义 |
gyp·sum
I. \ˈjipsəm\ noun
(-s)
Usage: often attributive
Etymology: Latin gypsum, gypsus, from Greek gypsos chalk, gypsum, cement, of Semitic origin; akin to Arabic jibs plaster, mortar
1. : a widely distributed mineral CaSO4.2H2O consisting of hydrous calcium sulfate that is colorless when pure, occurs massive or in the form of monoclinic crystals that easily split into folia, and is used chiefly as a soil amendment, as a retarder in portland cement, and in making plaster of Paris (hardness 2, specific gravity 2.31-2.32)
2. : plasterboard
< gypsum lath >
< gypsum sheathing >
< gypsum wallboard >
II. transitive verb
(-ed/-ing/-s)
: to treat (as soil or water) with gypsum |