"pianetto" meaning in Italian

{
  "etymology_templates": [
    {
      "args": {
        "1": "it",
        "2": "piano",
        "3": "etto"
      },
      "expansion": "piano + -etto",
      "name": "suffix"
    }
  ],
  "etymology_text": "From piano + -etto.",
  "forms": [
    {
      "form": "pianetta",
      "tags": [
        "feminine"
      ]
    },
    {
      "form": "pianetti",
      "tags": [
        "masculine",
        "plural"
      ]
    },
    {
      "form": "pianette",
      "tags": [
        "feminine",
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "pianetto (feminine pianetta, masculine plural pianetti, feminine plural pianette)",
      "name": "it-adj"
    }
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Italian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Italian terms suffixed with -etto",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "flattish"
      ],
      "id": "en-pianetto-it-adj-yeKhDOMM",
      "links": [
        [
          "flattish",
          "flattish"
        ]
      ]
    }
  ],
  "word": "pianetto"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "it",
        "2": "piano",
        "3": "etto"
      },
      "expansion": "piano + -etto",
      "name": "suffix"
    }
  ],
  "etymology_text": "From piano + -etto.",
  "forms": [
    {
      "form": "pianetta",
      "tags": [
        "feminine"
      ]
    },
    {
      "form": "pianetti",
      "tags": [
        "masculine",
        "plural"
      ]
    },
    {
      "form": "pianette",
      "tags": [
        "feminine",
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "pianetto (feminine pianetta, masculine plural pianetti, feminine plural pianette)",
      "name": "it-adj"
    }
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "Italian adjectives",
        "Italian adjectives with red links in their headword lines",
        "Italian entries with incorrect language header",
        "Italian lemmas",
        "Italian terms suffixed with -etto",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "flattish"
      ],
      "links": [
        [
          "flattish",
          "flattish"
        ]
      ]
    }
  ],
  "word": "pianetto"
}