[ uh-see-tuh-min-uh-fuhn, as-i-tuh- ]

  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)

Words Nearby acetaminophen Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use acetaminophen in a sentence

Scientific definitions for acetaminophen


[ 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.