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From well +‎ head.



wellhead (plural wellheads)

  1. The place where a spring breaks out of the ground; the source of water for a stream or well.
  2. (figuratively) The source of something; a fountainhead.
    • 1596, Edmund Spenser, The Faerie Qveene. [], part II (books IV–VI), London: [] [Richard Field] for VVilliam Ponsonby, OCLC 932900760, book V, canto IX, stanza 26, page 303:
      [H]e likened was to a welhed / Of euill words, and wicked ſclaunders by him ſhed.
    • 1932, D. H. Lawrence, “Painted Tombs of Tarquinia” in Etruscan Places, New York: Viking, 1957, p. 113,
      [...] a bull was not merely a stud animal worth so much, due to go to the butcher in a little while. It was a vast wonder-beast, a well-head of the great, furnace-like passion that makes the worlds roll and the sun surge up [...]
  3. The surface structure of an oil well etc.