Definition of preobrazhenskite in US English:

preobrazhenskite

noun

Mineralogy
  • A rare mineral of the orthorhombic crystal system consisting of a basic magnesium borate, Mg₃B₁₁O₁₅(OH)₉, and occurring as colourless, lemon-yellow, or dark grey nodules in salt deposits in Kazakhstan.

Origin

1950s; earliest use found in American Mineralogist. From Russian preobraženskit from the name of Pavel Ivanovič Preobraženskij, investigator of Russian salt deposits + -it.

Pronunciation

preobrazhenskite

/ˌpriːəʊbrəˈʒɛnskʌɪt/