apophyllite

[ uh-pof-uh-lahyt, ap-uh-fil-ahyt ]

/ əˈpɒf əˌlaɪt, ˌæp əˈfɪl aɪt /

noun

a hydrous potassium and calcium silicate mineral occurring in white crystals.

Words nearby apophyllite

apophasis, apophis, apophony, apophthegm, apophyge, apophyllite, apophysis, apophysitis, apoplast, apoplectic, apoplectiform

Origin of apophyllite

First recorded in 1800–10; apo- + -phyll + -ite¹

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for apophyllite

Apophyllite, a species of mineral of a foliated structure and pearly lustre, called also fish-eye stone.
The New Gresham Encyclopedia. Vol. 1 Part 2|Various
Apophyllite always occurs as distinct crystals, which belong to the tetragonal system.
Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 3|Various

British Dictionary definitions for apophyllite

apophyllite

/ (əˈpɒfɪˌlaɪt, ˌæpəˈfɪlaɪt) /

noun

a white, colourless, pink, or green mineral consisting of a hydrated silicate of calcium, potassium, and fluorine in tetragonal crystalline form. It occurs in cracks in volcanic rocks. Formula: KCa 4 (Si 4 O 10) 2 (OH 1 F).8H 2 O

Word Origin for apophyllite

C19: from French, from apo- + Greek phullon leaf + -ite 1; referring to its tendency to exfoliate

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012