plasticizer

[ plas-tuh-sahy-zer ]
/ ˈplæs təˌsaɪ zər /

noun

any of a group of substances that are used in plastics or other materials to impart viscosity, flexibility, softness, or other properties to the finished product.
an admixture for making mortar or concrete workable with little water.

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Origin of plasticizer

First recorded in 1920–25; plasticize + -er1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for plasticizer

plasticizer

plasticiser

/ (ˈplæstɪˌsaɪzə) /

noun

any of a number of substances added to materials in order to modify their physical properties. Their uses include softening and improving the flexibility of plastics and preventing dried paint coatings from becoming too brittle
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