1) Decubitus ulcer 2) Hospital affliction 3) Painful hospital development 4) Pressure sore 5) Result of consistent lying 6) Ulcer 7) Ulceration 
• (n.) A sore on the back or hips caused by lying for a long time in bed.
an ulceration of skin and underlying tissue caused by pressure that limits the blood supply to the affected area. As the name indicates, bedsores are ... [1 related articles]
<dermatology> A chronic ulcer that appears in pressure areas in debilitated patients confined to bed or otherwise immobilised, due to a circulatory defect from the enhanced tissue pressure in high-contact areas, often occurring over a bony prominence (for example sacral decubitus). ... (13 Nov 1997) ... 
(bed´sor″) pressure ulcer.
Bed'sore` noun (Medicine) A sore on the back or hips caused by lying for a long time in bed. 
Type: Term Pronunciation: bed′sōr Synonyms: decubitus ulcer
Bedsore: See: Bed sore.
[n] - a chronic ulcer of the skin caused by prolonged pressure on it (as in bedridden patients)
pressure sore noun a chronic ulcer of the skin caused by prolonged pressure on it (as in bedridden patients)
an ulceration of the skin and subcutaneous tissue caused by poor circulation due to prolonged pressure on body parts, esp. bony protuberances, occurring in bedridden or immobile patients; decubitus ulcer.