"retro-" meaning in Spanish

{
  "etymology_templates": [
    {
      "args": {
        "1": "es",
        "2": "la",
        "3": "retrō"
      },
      "expansion": "Latin retrō",
      "name": "der"
    }
  ],
  "etymology_text": "From Latin retrō.",
  "head_templates": [
    {
      "args": {
        "1": "es",
        "2": "prefix"
      },
      "expansion": "retro-",
      "name": "head"
    }
  ],
  "hyphenation": [
    "re‧tro-"
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages using catfix",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 7 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Spanish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "retro-"
      ],
      "id": "en-retro--es-prefix-0~C4C08O",
      "links": [
        [
          "retro-",
          "retro-#English"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/retɾo/"
    },
    {
      "ipa": "[re.t̪ɾo]"
    }
  ],
  "word": "retro-"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "es",
        "2": "la",
        "3": "retrō"
      },
      "expansion": "Latin retrō",
      "name": "der"
    }
  ],
  "etymology_text": "From Latin retrō.",
  "head_templates": [
    {
      "args": {
        "1": "es",
        "2": "prefix"
      },
      "expansion": "retro-",
      "name": "head"
    }
  ],
  "hyphenation": [
    "re‧tro-"
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        "Pages using catfix",
        "Pages with 7 entries",
        "Pages with entries",
        "Spanish 2-syllable words",
        "Spanish entries with incorrect language header",
        "Spanish lemmas",
        "Spanish prefixes",
        "Spanish terms derived from Latin",
        "Spanish terms with IPA pronunciation"
      ],
      "glosses": [
        "retro-"
      ],
      "links": [
        [
          "retro-",
          "retro-#English"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/retɾo/"
    },
    {
      "ipa": "[re.t̪ɾo]"
    }
  ],
  "word": "retro-"
}