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[uh-see-tuh-min-uh-fuh n, as-i-tuh-]
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noun Pharmacology.
  1. a crystalline substance, C8H9NO2, used as a headache and pain reliever and to reduce fever.

Origin of acetaminophen

First recorded in 1955–60; acet- + amino- + phen(ol)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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Word Origin and History for acetaminophen


U.S. name for "para-acetylaminophenol," 1960, composed of syllables from the chemical name; in Britain, the same substance is paracetamol.

Online Etymology Dictionary, © 2010 Douglas Harper

acetaminophen in Medicine


(ə-sē′tə-mĭnə-fən, ăs′ə-)
  1. A crystalline compound used in chemical synthesis and in medicine to relieve pain and reduce fevers.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

acetaminophen in Science


[ə-sē′tə-mĭnə-fən, ăs′ə-]
  1. A crystalline compound used in medicine to relieve pain and reduce fever. Chemical formula: C8H9NO2.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.