apophyllite Hear it!

apophyllite definition

apophyl·lite (-ə līt′)

noun

a semihard, hydrous, tetragonal mineral, KCaSiO(F,OH)·8HO, usually found as variously colored crystals or flat, sheetlike plates

Etymology: < apo- + Gr phyllon, a leaf + -ite: so named from its flaking off under the blowpipe

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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