[pol-ee-am-ahyd, -id]

noun Chemistry.

a polymer in which the monomer units are linked together by the amide group –CONH–.

Nearby words

  1. polyadenopathy,
  2. polyadenylic acid,
  3. polyadic,
  4. polyalcohol,
  5. polyalphabetic substitution,
  6. polyamine,
  7. polyamorous,
  8. polyamory,
  9. polyandria,
  10. polyandric

Origin of polyamide

First recorded in 1925–30; poly- + amide

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for polyamide



any one of a class of synthetic polymeric materials containing recurring -CONH- groupsSee also nylon
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

Science definitions for polyamide



A polymer produced by the reaction of the amino group (NH2) from one molecule with the carboxylic acid group (CO2H) from another molecule. The resulting structure is similar to that of a protein. Silk is a naturally occurring polyamide, and nylon is a synthetic polyamide.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.