"metavariable" meaning in All languages combined

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  "etymology_text": "From meta- + variable.",
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    {
      "form": "metavariables",
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          "ref": "2006 March 13, Lutz Martin, “Relative Clause Construal”, in The Dynamics of Language, Brill, →ISBN, page 85:",
          "text": "The pragmatic process of substitution requires some given context to provide an appropriate substituend for a metavariable projected by a pronoun.",
          "type": "quote"
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          "ref": "2016, Aaron Stump, Verified Functional Programming in Agda, page 198:",
          "text": "If it is a programming language, it will almost always have its own notion of variables, and hence the distinction between object-language variables and metavariables is useful.",
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        "A symbol or string of symbols belonging to a metalanguage and standing for elements of some object language."
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        "(logic) A symbol or string of symbols belonging to a metalanguage and standing for elements of some object language."
      ],
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        "metavariable"
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  ],
  "etymology_text": "From meta- + variable.",
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