apophyllite

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

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

Origin of apophyllite

1
First recorded in 1800–10; apo- + -phyll + -ite1

Words Nearby apophyllite

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British Dictionary definitions for apophyllite

apophyllite

/ (əˈpɒfɪˌlaɪt, ˌæpəˈfɪlaɪt) /


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

Origin of apophyllite

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

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