porcellanite
/pɔːˈsɛlənʌɪt/(also porcelanite)
noun
Geology. Originally: a hardened clay or shale resulting from thermal metamorphism; also called porcelain jasper. Later also: any dense siliceous rock with an appearance resembling unglazed porcelain.
Origin
Late 18th century; earliest use found in Richard Kirwan (1733–1812), chemist and mineralogist. From German Porzellanit from Porzellan + -it.
- negative confession
- negative crystal
- negative definite
- negative energy
- negative equity
- negative eugenics
- negative evidence
- negative eyepiece
- negative feedback
- negative flag
- negative g
- negative gearing
- negative geotropism
- negative glow
- negative-going
- negative growth
- negative income tax
- negative instance
- negatively
- negativeness
- negative oath
- negative option
- negative pedal
- negative phase sequence
- negative pledge