Definition of phenakite in English:

phenakite

noun

(also phenacite)
Mineralogy
  • A rare mineral of the trigonal system consisting of beryllium silicate, Be₂ SiO₄, and occurring as colourless or white scales and prisms.

Pronunciation

phenakite

/ˈfiːnəkʌɪt/ /ˈfɛnəkʌɪt/

Origin

Mid 19th century; earliest use found in London and Edinburgh Philosophical Magazine. From German Phenakit from ancient Greek ϕένακ-, ϕέναξ cheat (of uncertain origin: see note) + German -it, so called on account of its having been mistaken for quartz.