WordReference Random House Unabridged Dictionary of American English © 2026
hard′ mass′,
- Jewelrya hard glass used for imitating gemstones.
- Jewelry(not in technical use)
- any glass for imitating gemstones, esp. emerald.
- any of certain synthetic gemstones.
'hard mass' also found in these entries (note: many are not synonyms or translations):