cfs

(pathology) Initialism of chronic fatigue syndrome. [(pathology) A condition characterized by immune, endocrine and neurologic pathology whose main symptoms are extreme fatigue, extremely low stamina, muscle pain, lymph node swelling, postexertional malaise, and cognitive difficulties.]

(pathology) Initialism of cramp fasciculation syndrome. [A rare peripheral-nerve hyperexcitability disorder that causes fasciculations, cramps, pain, fatigue, and muscle stiffness.]

(Canada, aviation) Initialism of Canada Flight Supplement (a pilot's guide to aerodromes, air control zones, and airways in Canadian airspace and Canadian air traffic control zones).