rusty gold
Mining
noun
Gold having a surface coating, typically of iron oxide, that makes it resistant to amalgamation.
Origin
Mid 19th century.
- unchain
- unchallengeable
- unchallengeably
- unchallenged
- unchallenging
- unchancy
- unchangeability
- unchangeable
- unchangeableness
- unchangeably
- unchanged
- unchanging
- unchangingly
- unchaperoned
- uncharacteristic
- uncharacteristically
- uncharged
- uncharismatic
- uncharitable
- uncharitableness
- uncharitably
- uncharted
- unchartered
- unchaste
- unchastely