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  1. Oxford American Dictionary

    secondary structure

    • IPA[ˈsekənˌderē ˈstrək(t)SHər]
    • n.
      the local three-dimensional structure of sheets, helices, or other forms adopted by a polynucleotide or polypeptide chain, due to electrostatic attraction between neighboring residues.

    • noun: secondary structure, plural noun: secondary structures