: a mineral composed of a hydrous silicate of potassium, calcium, and fluorine that is related to the zeolites and is usually found in transparent square prisms or white or grayish masses

Word History


French, from apo- + Greek phyllon leaf — more at blade

First Known Use

circa 1807, in the meaning defined above

Time Traveler
The first known use of apophyllite was circa 1807

Dictionary Entries Near apophyllite

Cite this Entry

“Apophyllite.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/apophyllite. Accessed 25 Jun. 2024.

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