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pectolite

[pek-tuh-lahyt]
noun
  1. a mineral, hydrous calcium sodium silicate, usually occurring in radiating groups of crystals in rock cavities.
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Origin of pectolite

1820–30; < Greek pēktó(s) made solid (see pectic) + -lite
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018