fountainhead

Noun
  1. An abundant source (synset 106688724)
    "she was a well of information"
    is a type of: source - a document (or organization) from which information is obtained
    same as: well, wellspring
  2. The source of water from which a stream arises (synset 108525470)
    "they tracked him back toward the head of the stream"
    is a type of: beginning, origin, root, rootage, source - the place where something begins, where it springs into being
    same as: head, headspring

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