"metrician" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "fr",
        "2": "métricien"
      },
      "expansion": "French métricien",
      "name": "cog"
    }
  ],
  "etymology_text": "Compare French métricien. See meter (“rhythm”).",
  "forms": [
    {
      "form": "metricians",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "metrician (plural metricians)",
      "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"
        }
      ],
      "glosses": [
        "A composer of verses."
      ],
      "id": "en-metrician-en-noun-BqIBs8zS",
      "links": [
        [
          "composer",
          "composer"
        ],
        [
          "verse",
          "verse"
        ]
      ],
      "raw_glosses": [
        "(obsolete) A composer of verses."
      ],
      "synonyms": [
        {
          "word": "metrifier"
        },
        {
          "word": "metrist"
        },
        {
          "word": "versemonger"
        },
        {
          "word": "versesmith"
        }
      ],
      "tags": [
        "obsolete"
      ]
    }
  ],
  "word": "metrician"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "fr",
        "2": "métricien"
      },
      "expansion": "French métricien",
      "name": "cog"
    }
  ],
  "etymology_text": "Compare French métricien. See meter (“rhythm”).",
  "forms": [
    {
      "form": "metricians",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "metrician (plural metricians)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English 3-syllable words",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms with obsolete senses",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "A composer of verses."
      ],
      "links": [
        [
          "composer",
          "composer"
        ],
        [
          "verse",
          "verse"
        ]
      ],
      "raw_glosses": [
        "(obsolete) A composer of verses."
      ],
      "synonyms": [
        {
          "word": "metrifier"
        },
        {
          "word": "metrist"
        },
        {
          "word": "versemonger"
        },
        {
          "word": "versesmith"
        }
      ],
      "tags": [
        "obsolete"
      ]
    }
  ],
  "word": "metrician"
}