"proportioner" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "proportion",
        "3": "er"
      },
      "expansion": "proportion + -er",
      "name": "suffix"
    }
  ],
  "etymology_text": "proportion + -er",
  "forms": [
    {
      "form": "proportioners",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "proportioner (plural proportioners)",
      "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": "English terms suffixed with -er",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "A basic pumping unit consisting of two positive displacement pumps designed to dispense two components at a precisely controlled ratio."
      ],
      "id": "en-proportioner-en-noun-XqRvnIaA",
      "links": [
        [
          "positive",
          "positive"
        ],
        [
          "displacement",
          "displacement"
        ],
        [
          "dispense",
          "dispense"
        ],
        [
          "ratio",
          "ratio"
        ]
      ]
    }
  ],
  "word": "proportioner"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "proportion",
        "3": "er"
      },
      "expansion": "proportion + -er",
      "name": "suffix"
    }
  ],
  "etymology_text": "proportion + -er",
  "forms": [
    {
      "form": "proportioners",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "proportioner (plural proportioners)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms suffixed with -er"
      ],
      "glosses": [
        "A basic pumping unit consisting of two positive displacement pumps designed to dispense two components at a precisely controlled ratio."
      ],
      "links": [
        [
          "positive",
          "positive"
        ],
        [
          "displacement",
          "displacement"
        ],
        [
          "dispense",
          "dispense"
        ],
        [
          "ratio",
          "ratio"
        ]
      ]
    }
  ],
  "word": "proportioner"
}