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单词 alexandrite
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WordReference Random House Unabridged Dictionary of American English © 2024
al•ex•an•drite  (al′ig zan′drīt, -zän′-),USA pronunciation n. [Mineral.]
  1. Mineralogya variety of chrysoberyl, green by daylight and red-violet by artificial light, used as a gem.
  • 1830–40; named after Alexander I of Russia; see -ite1

Collins Concise English Dictionary © HarperCollins Publishers::
alexandrite /ˌælɪɡˈzændraɪt/ n
  1. a green variety of chrysoberyl used as a gemstone
Etymology: 19th Century: named after Alexander I (1777–1825), tsar of Russia (1801–25); see -ite1
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更新时间：2025/7/23 9:21:45