"Portlandian" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "Portland",
        "3": "-ian"
      },
      "expansion": "Portland + -ian",
      "name": "affix"
    },
    {
      "args": {
        "1": "en",
        "2": "Isle of Portland"
      },
      "expansion": "Isle of Portland",
      "name": "l"
    }
  ],
  "etymology_text": "From Portland + -ian. Named after the Isle of Portland in Dorset where the strata are exposed and have been extensively worked.",
  "head_templates": [
    {
      "args": {},
      "expansion": "Portlandian",
      "name": "en-proper noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "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 terms suffixed with -ian",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Geology",
          "orig": "en:Geology",
          "parents": [
            "Earth sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "The Tithonian stage or age, now considered strata about 150 million years old."
      ],
      "id": "en-Portlandian-en-name-otNul1Ww",
      "links": [
        [
          "geology",
          "geology"
        ],
        [
          "Tithonian",
          "Tithonian"
        ],
        [
          "stage",
          "stage"
        ],
        [
          "age",
          "age"
        ],
        [
          "strata",
          "strata"
        ]
      ],
      "raw_glosses": [
        "(archaic, geology) The Tithonian stage or age, now considered strata about 150 million years old."
      ],
      "tags": [
        "archaic"
      ],
      "topics": [
        "geography",
        "geology",
        "natural-sciences"
      ],
      "wikipedia": [
        "Portland Group (geology)"
      ]
    }
  ],
  "word": "Portlandian"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "Portland",
        "3": "-ian"
      },
      "expansion": "Portland + -ian",
      "name": "affix"
    },
    {
      "args": {
        "1": "en",
        "2": "Isle of Portland"
      },
      "expansion": "Isle of Portland",
      "name": "l"
    }
  ],
  "etymology_text": "From Portland + -ian. Named after the Isle of Portland in Dorset where the strata are exposed and have been extensively worked.",
  "head_templates": [
    {
      "args": {},
      "expansion": "Portlandian",
      "name": "en-proper noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English proper nouns",
        "English terms suffixed with -ian",
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        "English uncountable nouns",
        "en:Geology"
      ],
      "glosses": [
        "The Tithonian stage or age, now considered strata about 150 million years old."
      ],
      "links": [
        [
          "geology",
          "geology"
        ],
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          "Tithonian",
          "Tithonian"
        ],
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        ],
        [
          "age",
          "age"
        ],
        [
          "strata",
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        ]
      ],
      "raw_glosses": [
        "(archaic, geology) The Tithonian stage or age, now considered strata about 150 million years old."
      ],
      "tags": [
        "archaic"
      ],
      "topics": [
        "geography",
        "geology",
        "natural-sciences"
      ],
      "wikipedia": [
        "Portland Group (geology)"
      ]
    }
  ],
  "word": "Portlandian"
}