gypsine

from The Century Dictionary.

• Same as gypseous.
• noun The trade-name for a fire-proof material, for use in building, consisting of plastic hydraulic lime mixed with coke or sand and asbestos and pressed into blocks like bricks.
• noun A dusting-powder containing arseniate of lead, applied to plants as an insecticide.

from the GNU version of the Collaborative International Dictionary of English.

• adjective rare Gypseous.