"emerald" in the noun sense
1. emerald
a green transparent form of beryl highly valued as a gemstone
2. emerald
a transparent piece of emerald that has been cut and polished and is valued as a precious gem
3. emerald
the green color of an emerald
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License