English

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Alternative forms

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Etymology

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From sea +‎ adder. Compare Old English mere-næddra (sea-adder, lamprey).

Noun

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sea adder (plural sea adders)

  1. A European fifteen-spined stickleback, a fish of species Spinachia spinachia (syn. Gasterosteus spinachia).
  2. A tanglefish, or greater pipefish (Syngnathus acus).

References

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