(physics, meteorology) An extensive area of the Earth's surface over which bodies of air frequently remain for a sufficient time to acquire characteristic temperature and moisture properties imparted by that surface. Air so modified becomes identifiable as a distinct air mass. See airmass.

cat scratch disease

official name of the Azores

The region of Brazil comprising the states of Goiás, Mato Grosso, Mato Grosso do Sul and the Distrito Federal.

A historical region in the Philippines, composed of the provinces of Sulu, Tawi-Tawi, Lanao del Sur, Basilan, and Maguindanao

(biology, medicine) A chronic systemic disease characterized by severe pain, swelling, changes in the skin (e.g., erythema, edema), functional impairment, and sensory and vasomotor disturbance. Often it initially affects an arm or leg before spreading through the body; it is associated with dysregulation of the central nervous system and autonomic nervous system.

plural of complex regional pain syndrome

an autonomous region located in the southern Philippines.