"lucernal" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "la",
        "3": "lucerna",
        "4": "",
        "5": "a lamp"
      },
      "expansion": "Latin lucerna (“a lamp”)",
      "name": "uder"
    }
  ],
  "etymology_text": "Latin lucerna (“a lamp”).",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "lucernal (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
        },
        {
          "kind": "other",
          "name": "English undefined derivations",
          "parents": [
            "Undefined derivations",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "lucernal microscope"
        }
      ],
      "glosses": [
        "Of, pertaining to, or using a lamp."
      ],
      "id": "en-lucernal-en-adj-w7dREpO5",
      "links": [
        [
          "lamp",
          "lamp"
        ]
      ],
      "raw_glosses": [
        "(archaic) Of, pertaining to, or using a lamp."
      ],
      "tags": [
        "archaic",
        "not-comparable"
      ]
    }
  ],
  "word": "lucernal"
}

{
  "derived": [
    {
      "word": "lucernal microscope"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "la",
        "3": "lucerna",
        "4": "",
        "5": "a lamp"
      },
      "expansion": "Latin lucerna (“a lamp”)",
      "name": "uder"
    }
  ],
  "etymology_text": "Latin lucerna (“a lamp”).",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "lucernal (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English 3-syllable words",
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English terms derived from Latin",
        "English terms with archaic senses",
        "English uncomparable adjectives",
        "English undefined derivations",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "Of, pertaining to, or using a lamp."
      ],
      "links": [
        [
          "lamp",
          "lamp"
        ]
      ],
      "raw_glosses": [
        "(archaic) Of, pertaining to, or using a lamp."
      ],
      "tags": [
        "archaic",
        "not-comparable"
      ]
    }
  ],
  "word": "lucernal"
}