Etymology

black dragon

Today it means: Synonym of black tar heroin. Full definition →

Chinese 烏龍 /乌龙
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The story

  1. Chinese · calque of烏龍 /乌龙
  2. English todayblack dragon

In sense 2, a calque of Chinese 烏龍 /乌龙 (wūlóng).

Etymology from Wiktionary, CC BY-SA 4.0.