plural -s
: a whitish or grayish monoclinic mineral NaCa2Si3O8(OH) consisting of a basic sodium calcium silicate occurring in crystal aggregates or fibrous masses (hardness 5, specific gravity 2.68–2.78)

Word History


German pektolith, from Greek pēktos compacted (from pēgnynai to fix, fasten) + German -lith -lite

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Dictionary Entries Near pectolite

Cite this Entry

“Pectolite.” Dictionary, Merriam-Webster, Accessed 24 Jul. 2024.

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