a chronic ulcer of the skin caused by prolonged pressure on it (as in bedridden patients)
同义词：pressure sore, decubitus ulcer
bedsore详细解释
bed.sore n.（名词）A pressure-induced ulceration of the skin occurring in persons confined to bed for long periods of time.Also called decubitus ulcer 褥疮：因人常期卧床，皮肤受压而引起的溃疡也作 decubitus ulcer
