well·head /ˈwɛlˌhɛd/
水源,泉源
Well·head n. A source, spring, or fountain.
At the wellhead the purest streams arise. --Spenser.
Our public-school and university life is a great wellhead of new and irresponsible words. --Earle.
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wellhead
n 1: the source of water for a well [syn: wellspring]
2: a structure built over a well