micropore

[ mahy-kruh-pawr, -pohr ]
/ ˈmaɪ krəˌpɔr, -ˌpoʊr /

noun

a tiny opening, as in specialized biological filters or in the shells of some animals.

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Origin of micropore

First recorded in 1880–85; micro- + pore2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020