"mast-" meaning in English

{
  "etymology_number": 1,
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    {
      "args": {
        "1": "en",
        "2": "grc",
        "3": "μάσταξ",
        "4": "",
        "5": "jaws, what chews"
      },
      "expansion": "Ancient Greek μάσταξ (mástax, “jaws, what chews”)",
      "name": "der"
    }
  ],
  "etymology_text": "From Ancient Greek μάσταξ (mástax, “jaws, what chews”).",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "prefix",
        "head": "",
        "sort": ""
      },
      "expansion": "mast-",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "mast-",
      "name": "en-prefix"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        {
          "_dis": "78 7 15",
          "kind": "other",
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        }
      ],
      "derived": [
        {
          "word": "mastoid"
        }
      ],
      "glosses": [
        "mastoid process."
      ],
      "id": "en-mast--en-prefix-Hw4JjifW",
      "links": [
        [
          "mastoid process",
          "mastoid process"
        ]
      ],
      "related": [
        {
          "word": "mastoidal"
        },
        {
          "word": "mastoidectomy"
        },
        {
          "word": "mastoiditis"
        }
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "synonyms": [
    {
      "_dis1": "0 0 0",
      "word": "masto-"
    }
  ],
  "word": "mast-"
}

{
  "derived": [
    {
      "_dis1": "0 0",
      "word": "mastectomy"
    },
    {
      "_dis1": "0 0",
      "word": "mastoplasty"
    }
  ],
  "etymology_number": 2,
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "grc",
        "3": "μαστός",
        "4": "",
        "5": "breast"
      },
      "expansion": "Ancient Greek μαστός (mastós, “breast”)",
      "name": "der"
    }
  ],
  "etymology_text": "From Ancient Greek μαστός (mastós, “breast”).",
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      "args": {
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      "expansion": "mast-",
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    },
    {
      "args": {},
      "expansion": "mast-",
      "name": "en-prefix"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "prefix",
  "related": [
    {
      "_dis1": "0 0",
      "word": "-mastia"
    }
  ],
  "senses": [
    {
      "glosses": [
        "Relating to a breast or nipple."
      ],
      "id": "en-mast--en-prefix-3cOxidr6",
      "links": [
        [
          "breast",
          "breast"
        ],
        [
          "nipple",
          "nipple"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    },
    {
      "glosses": [
        "Relating to homologous mammary organs, such as udders."
      ],
      "id": "en-mast--en-prefix-REn-beDz",
      "links": [
        [
          "homologous",
          "homologous#Adjective"
        ],
        [
          "udder",
          "udder"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "synonyms": [
    {
      "_dis1": "0 0 0",
      "word": "masto-"
    },
    {
      "_dis1": "0 0",
      "word": "mammo-"
    }
  ],
  "word": "mast-"
}

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  "derived": [
    {
      "word": "mastoid"
    }
  ],
  "etymology_number": 1,
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    {
      "args": {
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        "3": "μάσταξ",
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      },
      "expansion": "Ancient Greek μάσταξ (mástax, “jaws, what chews”)",
      "name": "der"
    }
  ],
  "etymology_text": "From Ancient Greek μάσταξ (mástax, “jaws, what chews”).",
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      "expansion": "mast-",
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    },
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      "args": {},
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "prefix",
  "related": [
    {
      "word": "mastoidal"
    },
    {
      "word": "mastoidectomy"
    },
    {
      "word": "mastoiditis"
    }
  ],
  "senses": [
    {
      "glosses": [
        "mastoid process."
      ],
      "links": [
        [
          "mastoid process",
          "mastoid process"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "masto-"
    }
  ],
  "word": "mast-"
}

{
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    "English entries with incorrect language header",
    "English lemmas",
    "English prefixes",
    "English terms derived from Ancient Greek",
    "Pages using catfix",
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  ],
  "derived": [
    {
      "word": "mastectomy"
    },
    {
      "word": "mastoplasty"
    }
  ],
  "etymology_number": 2,
  "etymology_templates": [
    {
      "args": {
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        "2": "grc",
        "3": "μαστός",
        "4": "",
        "5": "breast"
      },
      "expansion": "Ancient Greek μαστός (mastós, “breast”)",
      "name": "der"
    }
  ],
  "etymology_text": "From Ancient Greek μαστός (mastós, “breast”).",
  "head_templates": [
    {
      "args": {
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        "2": "prefix",
        "head": "",
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      "expansion": "mast-",
      "name": "head"
    },
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      "args": {},
      "expansion": "mast-",
      "name": "en-prefix"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "prefix",
  "related": [
    {
      "word": "-mastia"
    }
  ],
  "senses": [
    {
      "glosses": [
        "Relating to a breast or nipple."
      ],
      "links": [
        [
          "breast",
          "breast"
        ],
        [
          "nipple",
          "nipple"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    },
    {
      "glosses": [
        "Relating to homologous mammary organs, such as udders."
      ],
      "links": [
        [
          "homologous",
          "homologous#Adjective"
        ],
        [
          "udder",
          "udder"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "mammo-"
    },
    {
      "word": "masto-"
    }
  ],
  "word": "mast-"
}