Definition of matlockite in English:

matlockite

noun

Mineralogy
  • A tetragonal fluoride and chloride of lead, PbFCl, usually occurring as transparent, colourless to yellow or yellowish brown tabular crystals.

Origin

Mid 19th century (in an earlier sense). From Matlock, the name of a town in Derbyshire, England + -ite.

Pronunciation

matlockite

/ˈmatləkʌɪt//ˈmatlɒkʌɪt/