See Also: Prime Meridian(dictionary)
Prime Meridian - Sailing(gambling)
plaster(2)(dictionary)
plaster(1)(dictionary)
plaster(medicine)
plaster bandage(medicine)
plaster 2, verb(dictionary)
plaster of paris(encyclopedia)
plaster cast(dictionary)
plaster of Paris(dictionary)

plaster of paris (sh) and Prime Meridian (oh)


plaster of paris (sh)




Quick-setting gypsum plaster consisting of a fine white powder, calcium sulfate hemihydrate, which hardens when moistened and allowed to dry.

It is made by heating gypsum to 250-360¡ãF (120-180¡ãC). Used since ancient times, plaster of paris is so called because of its preparation from the abundant gypsum found in Paris. It is used to make molds and casts for ceramics and sculptures, to precast and hold ornamental plasterwork on ceilings and cornices, and for orthopedic bandages (casts). In medieval and Renaissance times, gesso (plaster of paris mixed with glue) was applied to wood panels, plaster, stone, or canvas to provide the ground for tempera and oil painting.


Prime Meridian (oh)



the imaginary line drawn from north to south on the earth, from which east and west are measured in degrees on a map