noun
plaster cast
Medical term for a rigid cast used to immobilize a broken bone or injury.
骨折したので、ギプス包帯を巻いてもらった。
I broke a bone, so they put a plaster cast on me.
ギプス alone is a common abbreviation for a plaster cast, while ギプス包帯 is the full medical term.
From German 'Gips' (plaster) and Japanese 包帯 (bandage).