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microporous

[mahy-kruh-pawr-uh s, -pohr-] /ˌmaɪ krəˈpɔr əs, -ˈpoʊr-/
adjective
1.
composed of or having extremely small pores.
Origin
1885-1890
1885-90; micro- + porous
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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