emerald
Longman Dictionary of Contemporary English 5++LDOCE 5++em·e·rald /ˈemərəld/ noun 
1. DCJ[countable] a valuable bright green stone that is often used in jewellery 翡翠，绿宝石2. [uncountable] a bright green colour 翠绿色 —emerald adjective
1. DCJ[countable] a valuable bright green stone that is often used in jewellery 翡翠，绿宝石2. [uncountable] a bright green colour 翠绿色 —emerald adjectiveExamples from the Corpus
emerald• There are distinct forms, each with its own beautiful shade of brilliant emerald, sap, and yellowish green.• The swells slid by, deep emerald on one side, chrome on the other.• The sun had found a chink in the clouds, and was gilding emerald meadows and dark woodlands.• Beyond the airport lay emerald hills, backlit by lightning.• Some of these also fetched a large sum, the emerald necklace making £396,000 and the tiara £275,000.• She was naked, except for golden anklets and bracelets set with emeralds.Origin emerald (1200-1300) Old French emeraude, from Latin smaragdusem·e·rald nounChineseSyllable
that Corpus valuable stone bright in used green is often a
emerald
em‧e‧rald /ˈemərəld/
noun
1. [countable] a valuable bright green stone that is often used in jewellery
2. [uncountable] a bright green colour
—emerald adjective
em‧e‧rald /ˈemərəld/
noun Date: 1200-1300
Language: Old French
Origin: emeraude, from Latin smaragdus
Language: Old French
Origin: emeraude, from Latin smaragdus
1. [countable] a valuable bright green stone that is often used in jewellery
2. [uncountable] a bright green colour
—emerald adjective