"sub-rectangular" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "sub",
        "3": "rectangular"
      },
      "expansion": "sub- + rectangular",
      "name": "prefix"
    }
  ],
  "etymology_text": "From sub- + rectangular.",
  "forms": [
    {
      "form": "more sub-rectangular",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most sub-rectangular",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "sub-rectangular (comparative more sub-rectangular, superlative most sub-rectangular)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "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 terms prefixed with sub-",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "The domestic architecture within settlements conformed to no particular plan, and could consist of free-standing circular to subrectangular houses with one or two rooms..."
        }
      ],
      "glosses": [
        "Having an overall rectangular shape, but with rounded edges."
      ],
      "id": "en-sub-rectangular-en-adj-I3Wq6Ug8"
    }
  ],
  "word": "sub-rectangular"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "sub",
        "3": "rectangular"
      },
      "expansion": "sub- + rectangular",
      "name": "prefix"
    }
  ],
  "etymology_text": "From sub- + rectangular.",
  "forms": [
    {
      "form": "more sub-rectangular",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most sub-rectangular",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "sub-rectangular (comparative more sub-rectangular, superlative most sub-rectangular)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English terms prefixed with sub-",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "text": "The domestic architecture within settlements conformed to no particular plan, and could consist of free-standing circular to subrectangular houses with one or two rooms..."
        }
      ],
      "glosses": [
        "Having an overall rectangular shape, but with rounded edges."
      ]
    }
  ],
  "word": "sub-rectangular"
}