Definition of "accelerometer" []

• An instrument used to measure acceleration. (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.

• "Q3: Do you think an accelerometer is necessary on a mobile phone?"
• "All the best features of the N95 model camera are there; the 5 megapixel Carl Zeiss designed Optics, glass lens and DVD-quality video, now enhanced by a dual-LED flash and built in accelerometer, which automatically switches the image to widescreen depending on how the phone is held."
• "Today, free software called ShakerRacer that lets you use a mobile phone with a built-in accelerometer to control toy cars."