"Mach band" meaning in All languages combined

{
  "etymology_text": "Named after the physicist Ernst Mach.",
  "forms": [
    {
      "form": "Mach bands",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Mach band (plural Mach bands)",
      "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 entries with topic categories using raw markup",
          "parents": [
            "Entries with topic 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"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Optical illusions",
          "orig": "en:Optical illusions",
          "parents": [
            "Vision",
            "Senses",
            "Perception",
            "Body",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Any of a series of bands of slightly different shades of grey that make up an optical illusion where the contrast between the bands appears to be exaggerated as soon as they contact one another."
      ],
      "id": "en-Mach_band-en-noun-kSntkDG2",
      "links": [
        [
          "optical illusion",
          "optical illusion"
        ],
        [
          "contrast",
          "contrast"
        ],
        [
          "exaggerate",
          "exaggerate"
        ]
      ],
      "wikipedia": [
        "Ernst Mach",
        "Mach bands"
      ]
    }
  ],
  "word": "Mach band"
}

{
  "etymology_text": "Named after the physicist Ernst Mach.",
  "forms": [
    {
      "form": "Mach bands",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Mach band (plural Mach bands)",
      "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 entries with topic categories using raw markup",
        "English eponyms",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with non-redundant non-automated sortkeys",
        "en:Optical illusions"
      ],
      "glosses": [
        "Any of a series of bands of slightly different shades of grey that make up an optical illusion where the contrast between the bands appears to be exaggerated as soon as they contact one another."
      ],
      "links": [
        [
          "optical illusion",
          "optical illusion"
        ],
        [
          "contrast",
          "contrast"
        ],
        [
          "exaggerate",
          "exaggerate"
        ]
      ],
      "wikipedia": [
        "Ernst Mach",
        "Mach bands"
      ]
    }
  ],
  "word": "Mach band"
}