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erector

[ih-rek-ter]
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noun
  1. Also e·rect·er. a person or thing that erects.
  2. Anatomy. a muscle that erects the body or one of its parts.
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Origin of erector

First recorded in 1530–40; erect + -or2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for erector

erector

erecter

noun
  1. anatomy any muscle that raises a part or makes it erect
  2. a person or thing that erects
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for erector

n.

1530s, agent noun in Latin form from erect (v.).

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Online Etymology Dictionary, © 2010 Douglas Harper

erector in Medicine

erector

(ĭ-rĕktər)
n.
  1. A muscle that makes a body part erect.arrector
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.