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The state or quality of being automatic.
(noun)
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Automatic mechanical action.
(noun)
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Philosophy The theory that the body is a machine whose functions are accompanied but not controlled by consciousness.
(noun)
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Physiology The involuntary functioning of an organ or other body structure that is not under conscious control, such as the beating of the heart or the dilation of the pupil of the eye.
(noun)
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Physiology The reflexive action of a body part.
(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.