"onico-" meaning in Portuguese

{
  "etymology_templates": [
    {
      "args": {
        "1": "pt",
        "2": "grc",
        "3": "ὄνυχος"
      },
      "expansion": "Borrowed from Ancient Greek ὄνυχος (ónukhos)",
      "name": "bor+"
    }
  ],
  "etymology_text": "Borrowed from Ancient Greek ὄνυχος (ónukhos), from ὄνυξ (ónux, “claw, nail, hoof”).",
  "head_templates": [
    {
      "args": {
        "1": "pt",
        "2": "prefix"
      },
      "expansion": "onico-",
      "name": "head"
    }
  ],
  "lang": "Portuguese",
  "lang_code": "pt",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Portuguese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "onicóforo"
        }
      ],
      "glosses": [
        "onycho- (Forms words relating to nails)"
      ],
      "id": "en-onico--pt-prefix-iSDLn3oO",
      "links": [
        [
          "onycho-",
          "onycho-"
        ],
        [
          "nail",
          "nail"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "onico-"
}

{
  "derived": [
    {
      "word": "onicóforo"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "pt",
        "2": "grc",
        "3": "ὄνυχος"
      },
      "expansion": "Borrowed from Ancient Greek ὄνυχος (ónukhos)",
      "name": "bor+"
    }
  ],
  "etymology_text": "Borrowed from Ancient Greek ὄνυχος (ónukhos), from ὄνυξ (ónux, “claw, nail, hoof”).",
  "head_templates": [
    {
      "args": {
        "1": "pt",
        "2": "prefix"
      },
      "expansion": "onico-",
      "name": "head"
    }
  ],
  "lang": "Portuguese",
  "lang_code": "pt",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        "Pages with 2 entries",
        "Pages with entries",
        "Portuguese entries with incorrect language header",
        "Portuguese lemmas",
        "Portuguese prefixes",
        "Portuguese terms borrowed from Ancient Greek",
        "Portuguese terms derived from Ancient Greek"
      ],
      "glosses": [
        "onycho- (Forms words relating to nails)"
      ],
      "links": [
        [
          "onycho-",
          "onycho-"
        ],
        [
          "nail",
          "nail"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "onico-"
}