pectolite

[pek-tuh-lahyt]

noun

a mineral, hydrous calcium sodium silicate, usually occurring in radiating groups of crystals in rock cavities.

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. 2019