Definition of apophyllite in English:

apophyllite

Syllabification: a·poph·yl·lite
Pronunciation: /əˈpäfəˌlīt, ˌapəˈfilīt
 
/

noun

A mineral occurring typically as white glassy prisms, usually as a secondary mineral in volcanic rocks. It is a hydrated silicate and fluoride of calcium and potassium.
More example sentences
  • Most of the cavities are filled or lined with crystalline formations of various zeolites, such as stilbite, scolecite, and heulandite, plus calcite and apophyllite; these minerals typically occur in combination with each other.
  • True, but names such as apatite, apophyllite, chlorite, serpentine, and tantalite are very common names that appear frequently in the world of a beginning collector, so their absence from references can only lead to frustration.
  • How about apatite, apophyllite, axinite, chlorite, hypersthene, scapolite, serpentine, tantalite, and wolframite?

Origin

early 19th century: from apo- + Greek phullon 'leaf' + -ite1.

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