1. An automatic instinctive unlearned reaction to a stimulus
   - reflex, reflex action, instinctive reflex, innate reflex, inborn reflex, unconditioned reflex, physiological reaction

Type of: reaction, response

• millennial
• millennian
• millennium
• millennium bug
• millenniumism
• millepede
• miller
• miller's-thumb
• millerite
• millesimal
• millet
• millettia
• milli-
• milliammeter
• milliampere
• milliard
• milliary
• millibar
• millicurie
• millidegree
• milliequivalent
• millifarad
• milligram
• millihenry
• Millikan