"rostra" meaning in Latin

{
  "categories": [
    {
      "kind": "other",
      "name": "Lemmes en latin",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Noms communs en latin",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Latin",
      "orig": "latin",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Pluriel de rostrum."
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Wiktionnaire:Exemples manquants en latin",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Les rostres, la tribune aux harangues (ainsi nommée à cause des éperons des navires ennemis qui l'ornaient)."
      ],
      "id": "fr-rostra-la-noun-SjGjcT96"
    }
  ],
  "tags": [
    "neuter"
  ],
  "word": "rostra"
}

{
  "categories": [
    "Lemmes en latin",
    "Noms communs en latin",
    "latin"
  ],
  "etymology_texts": [
    "Pluriel de rostrum."
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "categories": [
        "Wiktionnaire:Exemples manquants en latin"
      ],
      "glosses": [
        "Les rostres, la tribune aux harangues (ainsi nommée à cause des éperons des navires ennemis qui l'ornaient)."
      ]
    }
  ],
  "tags": [
    "neuter"
  ],
  "word": "rostra"
}