"seconde d’arc" meaning in Français

{
  "categories": [
    {
      "kind": "other",
      "name": "Locutions nominales en français",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Traductions en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Traductions en kotava",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Traductions en roumain",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Unités de mesure en français",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Français",
      "orig": "français",
      "parents": [],
      "source": "w"
    }
  ],
  "derived": [
    {
      "word": "microseconde d’arc"
    },
    {
      "word": "milliseconde d’arc"
    }
  ],
  "etymology_texts": [
    "De seconde en tant que division de la minute, et du complément d’arc de même origine que dans minute d’arc."
  ],
  "forms": [
    {
      "form": "secondes d’arc",
      "tags": [
        "plural"
      ]
    }
  ],
  "lang": "Français",
  "lang_code": "fr",
  "pos": "noun",
  "pos_title": "Locution nominale",
  "related": [
    {
      "word": "minute d’arc"
    }
  ],
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Lexique en français de la géométrie",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Unité de mesure d’angle plan égale à la soixantième partie de la minute d’arc. Son symbole est ″."
      ],
      "id": "fr-seconde_d’arc-fr-noun-FEcE2Qvv",
      "topics": [
        "geometry"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\sə.ɡɔ̃d d‿aʁk\\"
    }
  ],
  "synonyms": [
    {
      "word": "arcseconde"
    },
    {
      "word": "seconde"
    },
    {
      "word": "seconde angulaire"
    }
  ],
  "tags": [
    "feminine"
  ],
  "translations": [
    {
      "lang": "Anglais",
      "lang_code": "en",
      "word": "arcsecond"
    },
    {
      "lang": "Anglais",
      "lang_code": "en",
      "word": "second of arc"
    },
    {
      "lang": "Kotava",
      "lang_code": "avk",
      "word": "ivamukiverast"
    },
    {
      "lang": "Roumain",
      "lang_code": "ro",
      "tags": [
        "feminine"
      ],
      "word": "secundă de arc"
    },
    {
      "lang": "Roumain",
      "lang_code": "ro",
      "tags": [
        "feminine"
      ],
      "word": "arcsecundă"
    }
  ],
  "word": "seconde d’arc"
}

{
  "categories": [
    "Locutions nominales en français",
    "Traductions en anglais",
    "Traductions en kotava",
    "Traductions en roumain",
    "Unités de mesure en français",
    "français"
  ],
  "derived": [
    {
      "word": "microseconde d’arc"
    },
    {
      "word": "milliseconde d’arc"
    }
  ],
  "etymology_texts": [
    "De seconde en tant que division de la minute, et du complément d’arc de même origine que dans minute d’arc."
  ],
  "forms": [
    {
      "form": "secondes d’arc",
      "tags": [
        "plural"
      ]
    }
  ],
  "lang": "Français",
  "lang_code": "fr",
  "pos": "noun",
  "pos_title": "Locution nominale",
  "related": [
    {
      "word": "minute d’arc"
    }
  ],
  "senses": [
    {
      "categories": [
        "Lexique en français de la géométrie"
      ],
      "glosses": [
        "Unité de mesure d’angle plan égale à la soixantième partie de la minute d’arc. Son symbole est ″."
      ],
      "topics": [
        "geometry"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\sə.ɡɔ̃d d‿aʁk\\"
    }
  ],
  "synonyms": [
    {
      "word": "arcseconde"
    },
    {
      "word": "seconde"
    },
    {
      "word": "seconde angulaire"
    }
  ],
  "tags": [
    "feminine"
  ],
  "translations": [
    {
      "lang": "Anglais",
      "lang_code": "en",
      "word": "arcsecond"
    },
    {
      "lang": "Anglais",
      "lang_code": "en",
      "word": "second of arc"
    },
    {
      "lang": "Kotava",
      "lang_code": "avk",
      "word": "ivamukiverast"
    },
    {
      "lang": "Roumain",
      "lang_code": "ro",
      "tags": [
        "feminine"
      ],
      "word": "secundă de arc"
    },
    {
      "lang": "Roumain",
      "lang_code": "ro",
      "tags": [
        "feminine"
      ],
      "word": "arcsecundă"
    }
  ],
  "word": "seconde d’arc"
}