apophyllite

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

Origin of apophyllite

First recorded in 1800–10; apo- + -phyll + -ite1
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Historical Examples of apophyllite


British Dictionary definitions for apophyllite

apophyllite

noun
  1. 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
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