"Abbe number" meaning in English

{
  "etymology_text": "From the name of Ernst Abbe, a German physicist.",
  "forms": [
    {
      "form": "Abbe numbers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Abbe number (plural Abbe numbers)",
      "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 entries with language name categories using raw markup",
          "parents": [
            "Entries with language name categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A number that represents the reciprocal of the dispersive power of a substance with transparent qualities."
      ],
      "id": "en-Abbe_number-en-noun-~ruo2tbc",
      "links": [
        [
          "reciprocal",
          "reciprocal"
        ]
      ],
      "wikipedia": [
        "Ernst Abbe"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈɑ.bə ˈnʌm.bɚ/",
      "tags": [
        "General-American"
      ]
    },
    {
      "ipa": "/ˈæ.bi ˈnʌm.bɚ/",
      "tags": [
        "General-American"
      ]
    }
  ],
  "word": "Abbe number"
}

{
  "etymology_text": "From the name of Ernst Abbe, a German physicist.",
  "forms": [
    {
      "form": "Abbe numbers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Abbe number (plural Abbe numbers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with language name categories using raw markup",
        "English eponyms",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with IPA pronunciation",
        "English terms with non-redundant non-automated sortkeys"
      ],
      "glosses": [
        "A number that represents the reciprocal of the dispersive power of a substance with transparent qualities."
      ],
      "links": [
        [
          "reciprocal",
          "reciprocal"
        ]
      ],
      "wikipedia": [
        "Ernst Abbe"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈɑ.bə ˈnʌm.bɚ/",
      "tags": [
        "General-American"
      ]
    },
    {
      "ipa": "/ˈæ.bi ˈnʌm.bɚ/",
      "tags": [
        "General-American"
      ]
    }
  ],
  "word": "Abbe number"
}