"1-D" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "1-D (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "alt_of": [
        {
          "word": "one-dimensional"
        }
      ],
      "categories": [
        {
          "_dis": "55 45",
          "kind": "topical",
          "langcode": "en",
          "name": "Geometry",
          "orig": "en:Geometry",
          "parents": [
            "Mathematics",
            "Formal sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "Initialism of one-dimensional."
      ],
      "id": "en-1-D-en-adj-Fdt4dXrh",
      "links": [
        [
          "one-dimensional",
          "one-dimensional#English"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "initialism",
        "not-comparable"
      ]
    }
  ],
  "word": "1-D"
}

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "1-D (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "_dis": "5 95",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "6 94",
          "kind": "other",
          "name": "English entries with language name categories using raw markup",
          "parents": [
            "Entries with language name categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "5 95",
          "kind": "other",
          "name": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "6 94",
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "A selective service class denoting that the registrant is already a reserve member of the armed forces or a student taking military training, as in ROTC or an accepted aviation cadet applicant."
      ],
      "id": "en-1-D-en-noun-tMY2vXbz",
      "links": [
        [
          "selective service",
          "w:Selective Service System"
        ],
        [
          "reserve",
          "reserve#English"
        ],
        [
          "armed forces",
          "armed forces#English"
        ],
        [
          "ROTC",
          "ROTC#English"
        ]
      ],
      "tags": [
        "uncountable"
      ]
    }
  ],
  "word": "1-D"
}

{
  "categories": [
    "English adjectives",
    "English compound adjectives",
    "English entries with incorrect language header",
    "English entries with language name categories using raw markup",
    "English entries with topic categories using raw markup",
    "English lemmas",
    "English multiword terms",
    "English nouns",
    "English terms spelled with numbers",
    "English terms with non-redundant non-automated sortkeys",
    "English uncomparable adjectives",
    "English uncountable nouns",
    "English words without vowels",
    "en:Geometry"
  ],
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "1-D (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "alt_of": [
        {
          "word": "one-dimensional"
        }
      ],
      "categories": [
        "English initialisms"
      ],
      "glosses": [
        "Initialism of one-dimensional."
      ],
      "links": [
        [
          "one-dimensional",
          "one-dimensional#English"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "initialism",
        "not-comparable"
      ]
    }
  ],
  "word": "1-D"
}

{
  "categories": [
    "English adjectives",
    "English compound adjectives",
    "English entries with incorrect language header",
    "English entries with language name categories using raw markup",
    "English entries with topic categories using raw markup",
    "English lemmas",
    "English multiword terms",
    "English nouns",
    "English terms spelled with numbers",
    "English terms with non-redundant non-automated sortkeys",
    "English uncomparable adjectives",
    "English uncountable nouns",
    "English words without vowels",
    "en:Geometry"
  ],
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "1-D (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "glosses": [
        "A selective service class denoting that the registrant is already a reserve member of the armed forces or a student taking military training, as in ROTC or an accepted aviation cadet applicant."
      ],
      "links": [
        [
          "selective service",
          "w:Selective Service System"
        ],
        [
          "reserve",
          "reserve#English"
        ],
        [
          "armed forces",
          "armed forces#English"
        ],
        [
          "ROTC",
          "ROTC#English"
        ]
      ],
      "tags": [
        "uncountable"
      ]
    }
  ],
  "word": "1-D"
}