automatic-pilot

automatic pilot

noun
1.
Aeronautics. an airborne electronic control system that automatically maintains a preset heading and attitude. Also called automatic, autopilot, gyropilot, robot.
Idioms
2.
on automatic pilot, functioning in an unthinking or reflexive manner.
Origin:
1915–20

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
automatic pilot
 
—n
1.  Also called: autopilot a device that automatically maintains an aircraft on a preset course
2.  informal on automatic pilot acting without conscious thought because of tiredness, shock, or familiarity with the task being performed

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Automatic-pilot is always a great word to know.
So is bezoar. Does it mean:
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
the offspring of a zebra and a donkey.
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