Definition of monophane in US English:

monophane

noun

Mineralogy
historical
  • A mineral now regarded as identical with epistilbite.

Origin

Mid 19th century; earliest use found in Henry Watts (1815–1884), chemist. From mono- + -phane, after German Monophan.

Pronunciation

monophane

/ˈmɒnəfeɪn/