"grub screw" meaning in English

{
  "etymology_text": "From a fancied resemblance to a grub (insect larva), both in appearance and in the way that it can go down a hole as if down into a burrow.",
  "forms": [
    {
      "form": "grub screws",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "grub screw (plural grub screws)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "coordinate_terms": [
        {
          "word": "worm screw"
        }
      ],
      "glosses": [
        "A headless set screw."
      ],
      "hypernyms": [
        {
          "word": "screw"
        }
      ],
      "id": "en-grub_screw-en-noun-Hh6F6~hu",
      "synonyms": [
        {
          "word": "set screw"
        }
      ]
    }
  ],
  "word": "grub screw"
}

{
  "etymology_text": "From a fancied resemblance to a grub (insect larva), both in appearance and in the way that it can go down a hole as if down into a burrow.",
  "forms": [
    {
      "form": "grub screws",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "grub screw (plural grub screws)",
      "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",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "coordinate_terms": [
        {
          "word": "worm screw"
        }
      ],
      "glosses": [
        "A headless set screw."
      ],
      "hypernyms": [
        {
          "word": "screw"
        }
      ],
      "synonyms": [
        {
          "word": "set screw"
        }
      ]
    }
  ],
  "word": "grub screw"
}