"op art" meaning in Basque

{
  "categories": [
    {
      "kind": "other",
      "name": "Compositions en français",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Locutions nominales en basque",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Mots en basque issus d’un mot en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Basque",
      "orig": "basque",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "(1964) Calque de l'anglais op art,composé de optical et de art."
  ],
  "lang": "Basque",
  "lang_code": "eu",
  "pos": "noun",
  "pos_title": "Locution nominale",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Anglicismes en basque",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Lexique en basque de la peinture",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Op art"
      ],
      "id": "fr-op_art-eu-noun-prN3kVng",
      "raw_tags": [
        "Peinture"
      ],
      "tags": [
        "Anglicism"
      ]
    }
  ],
  "word": "op art"
}

{
  "categories": [
    "Compositions en français",
    "Locutions nominales en basque",
    "Mots en basque issus d’un mot en anglais",
    "basque"
  ],
  "etymology_texts": [
    "(1964) Calque de l'anglais op art,composé de optical et de art."
  ],
  "lang": "Basque",
  "lang_code": "eu",
  "pos": "noun",
  "pos_title": "Locution nominale",
  "senses": [
    {
      "categories": [
        "Anglicismes en basque",
        "Lexique en basque de la peinture"
      ],
      "glosses": [
        "Op art"
      ],
      "raw_tags": [
        "Peinture"
      ],
      "tags": [
        "Anglicism"
      ]
    }
  ],
  "word": "op art"
}