microporous

[ mahy-kruh-pawr-uh s, -pohr- ]
/ ˌmaɪ krəˈpɔr əs, -ˈpoʊr- /

adjective

composed of or having extremely small pores.

Origin of microporous

First recorded in 1885–90; micro- + porous
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019