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.
QUIZZES
FOR POSTERITY’S SAKE, TAKE THIS WORD OF THE DAY QUIZ!
Are words your bailiwick? Take the latest quiz on the words from July 6 to July 12 to find out.
Question 1 of 7
bailiwick
Words nearby apophyllite
apophasis, apophis, apophony, apophthegm, apophyge, apophyllite, apophysis, apophysitis, apoplast, apoplectic, apoplectiform
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
Example sentences from the Web for apophyllite
Apophyllite, a species of mineral of a foliated structure and pearly lustre, called also fish-eye stone.
Apophyllite always occurs as distinct crystals, which belong to the tetragonal system.
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