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Silastic

[si-las-tik]
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Trademark.
  1. a brand name for any of a group of substances containing polymeric silicones, having the properties of rubber but more capable of withstanding extremely high and low temperatures and other causes of deterioration, used in jet-plane engines, medical prosthetic devices, gaskets, electrical insulation, etc.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for silastic

Silastic

noun
  1. trademark a flexible inert silicone rubber, used esp in prosthetic medicine
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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