"miller's thumb" meaning in English

{
  "forms": [
    {
      "form": "miller's thumbs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "miller's thumb (plural miller's thumbs)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "lifeform",
          "langcode": "en",
          "name": "Scorpaeniform fish",
          "orig": "en:Scorpaeniform fish",
          "parents": [
            "Fish",
            "Vertebrates",
            "Chordates",
            "Animals",
            "Lifeforms",
            "All topics",
            "Life",
            "Fundamental",
            "Nature"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1599, [Thomas] Nashe, Nashes Lenten Stuffe, […], London: […] [Thomas Judson and Valentine Simmes] for N[icholas] L[ing] and C[uthbert] B[urby] […], →OCLC, page 1:",
          "text": "[I]n my exile and irkeſome diſcontented abandonment, the ſillieſt millers thombe, or contemptible ſtickle-banck of my enemies, is as buſie nibbling about my fame, as if I were a deade man throwne amongeſt them to feede vpon.",
          "type": "quote"
        }
      ],
      "glosses": [
        "The European bullhead (“a species of fish, Cottus gobio”)."
      ],
      "id": "en-miller's_thumb-en-noun-e6VMFnGC",
      "links": [
        [
          "European bullhead",
          "European bullhead#English"
        ],
        [
          "species",
          "species"
        ],
        [
          "fish",
          "fish#Noun"
        ],
        [
          "Cottus gobio",
          "Cottus gobio"
        ]
      ]
    }
  ],
  "word": "miller's thumb"
}

{
  "forms": [
    {
      "form": "miller's thumbs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "miller's thumb (plural miller's thumbs)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Scorpaeniform fish"
      ],
      "examples": [
        {
          "ref": "1599, [Thomas] Nashe, Nashes Lenten Stuffe, […], London: […] [Thomas Judson and Valentine Simmes] for N[icholas] L[ing] and C[uthbert] B[urby] […], →OCLC, page 1:",
          "text": "[I]n my exile and irkeſome diſcontented abandonment, the ſillieſt millers thombe, or contemptible ſtickle-banck of my enemies, is as buſie nibbling about my fame, as if I were a deade man throwne amongeſt them to feede vpon.",
          "type": "quote"
        }
      ],
      "glosses": [
        "The European bullhead (“a species of fish, Cottus gobio”)."
      ],
      "links": [
        [
          "European bullhead",
          "European bullhead#English"
        ],
        [
          "species",
          "species"
        ],
        [
          "fish",
          "fish#Noun"
        ],
        [
          "Cottus gobio",
          "Cottus gobio"
        ]
      ]
    }
  ],
  "word": "miller's thumb"
}