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an encasement or covering for the trunk, especially the thorax.
plaster-of-Paris jacket a casing of plaster of paris enveloping the body, for the purpose of giving support or correcting deformities; see also cast.
Sayre's jacket a plaster of Paris jacket used as a support for the vertebral column.
strait jacket popular name for camisole.
A plaster-of-Paris jacket used as a support for a deformity of the spinal column.
See also: jacket