pitch opal
Mineralogy rare
noun
A yellow to brown variety of common opal with a pitchy lustre.
Origin
Mid 19th century; earliest use found in Henry William Bristow (1817–1889), geologist.
- macaronic
- macaronically
- macaroni cheese
- macaronicism
- macaroni penguin
- macaroni tool
- macaroni wheat
- macaroon
- MacArthur, Dame Ellen
- MacArthur, Douglas
- Macartney rose
- macary bitter
- Macassar
- Macassar ebony
- Macassared
- Macassar oil
- Macau
- Macaulayan
- Macaulay, Dame Rose
- Macaulayesque
- Macaulay, Thomas Babington
- macaw
- macaw fat
- Macbeth
- MacBride principles