Definition of ophicalcite in US English:

ophicalcite

noun

Geology
  • A form of marble consisting of a mixture of serpentine and calcite; a particular variety of this.

Origin

Mid 19th century; earliest use found in Quarterly Journal of the Geological Society of London. From ancient Greek ὄϕις serpent + calcite, after French ophicalce.

Pronunciation

ophicalcite

/ɒfɪˈkalsʌɪt/