1. (medicine) poorly understood debilitating medical condition causing exhaustion, muscle and joint pain, and other symptoms
   - myalgic encephalomyelitis, ME

Encyclopedia: Chronic fatigue syndrome

• instructional
• instructions
• instructive
• instructively
• instructor
• instructorship
• instructress
• instrument
• instrument flying
• instrument landing
• instrument of execution
• instrument of punishment
• instrument of torture
• instrument panel
• instrumental
• instrumental conditioning
• instrumental music
• instrumental role
• instrumentalism
• instrumentalist
• instrumentality
• instrumentally
• instrumentate
• instrumentation
• insubordinate