There are multiple definitions:

1. proper orthogonal decomposition(English)

   • Signal analysis

2. postoperative day(English)

   • POM
   • Surgery, Prognosis
   • https://doi.org…000000000000401

3. perception of dyspnea(English)

   • as subjectively reported by patients, is related to the activity and strength of the inspiratory muscles, and influences the use of 'as needed' beta2-agonists
   • Respiratory system
   • https://doi.org…155/2002/746808

4. postoperative delirium(English)

   • defined as an acute onset fluctuating change in mental status characterized by a reduced awareness of the environment and disturbance of attention
   • DSM
   • Surgery, Anesthesiology/analgesia
   • https://doi.org…04075-1.00041-9

5. perioral dermatitis(English)

   • a common noncontagious skin disorder that can occur around the mouth, nose, and eyes. It is different from acne, rosacea, eczema, and dry skin, although the conditions can share overlapping features. More common in women ages 16 to 45. Also known as periorificial dermatitis
   • Pso, AD, PSO
   • Dermatology, Mouth, esophagus and stomach
   • https://doi.org….1111/jdv.17817