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hydra

US [ˈhaɪdrə]
UK ['haɪdrə]
  • n.水螅;许德拉;棘手的复杂事物;难以根绝的祸患
  • Web保湿用;长蛇座;九头蛇
Plural Form:hydras  Plural Form:hydrae  
hydra
n.
1.
许德拉,多头蛇(砍去一个头即长出新头,后为大力神赫拉克勒斯所杀)a snake with several heads. As one head was cut off, another one grew. In the end it was killed by Hercules.
2.
棘手的复杂事物;难以根绝的祸患a thing that is very difficult to deal with, because it continues for a long time or because it has many different aspects
3.
水螅an extremely small water creature with a tube-shaped body and tentacles around its mouth

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Definition:
Category:AllAll,OralOral,WrittenWritten,TitleTitle,TechnicalTechnical
Source:AllAll,DictionaryDictionary,WebWeb
Difficulty:AllAll,EasyEasy,MiddleMiddle,HardHard
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