[ak-ruh-loh-nahy-tril, -treel, -trahyl]
noun Chemistry.
a colorless, flammable, poisonous, carcinogenic liquid, C 3 H 3 N, used for the production of polymers and copolymers, as rubbers, fibers, and clear plastics for beverage containers.

1890–95; acryl(ic) + -o- + nitrile Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
acrylonitrile (ˌækrɪləʊˈnaɪtraɪl)
Also called: vinylcyanide a colourless liquid that is miscible with water and has toxic fumes: used in the manufacture of acrylic fibres and resins, rubber, and thermoplastics. Formula: CH2:CHCN
[C20: from acrylic + nitrile]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
acrylonitrile   (āk'rə-lō-nī'trəl, -trēl, -trīl)  Pronunciation Key 
A colorless, poisonous, liquid organic compound having a wide variety of industrial uses, such as in the manufacture of acrylic fibers, resins, and acrylamide. Chemical formula: C3H3N.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Acrylonitrile primarily affects the nervous system and lungs.
Exposure to acrylonitrile occurs mostly from breathing it in the air.
Acrylonitrile is not a household word, but products made from it are ubiquitous
  in our homes.
There are many methods available for monitoring employee exposures to
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