- any of various microporous synthetic materials used as leather substitutes.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- (of a plastic) permeable to water vapour
- a substance having this characteristic, esp one based on polyurethane and used in place of leather in making shoe uppers
C20: from poro (sity) + (poly) mer + -ic