a chronic medical condition of unproven origin experienced by some Gulf War (1991) veterans, characterized variously by fatigue, headaches, memory loss, aching joints, etc.
See Gulf War syndrome in American Heritage Dictionary 4
noun
A medical condition affecting some veterans of the Gulf War, characterized by fatigue, headache, joint pain, skin rashes, nausea, dizziness, and respiratory disorders, and attributed to reactions to prophylactic drugs and vaccines, infectious diseases, or exposure to pesticides and other chemicals, radiation, and smoke from oil fires. Also called Persian Gulf illness.