"proostracum" meaning in English

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  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "grc",
        "3": "προ-",
        "4": "",
        "5": "before"
      },
      "expansion": "Ancient Greek προ- (pro-, “before”)",
      "name": "uder"
    }
  ],
  "etymology_text": "From Ancient Greek προ- (pro-, “before”) + ὄστρᾰκον (óstrakon, “shell”).",
  "forms": [
    {
      "form": "proostraca",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "proostraca"
      },
      "expansion": "proostracum (plural proostraca)",
      "name": "en-noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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          "name": "Zoology",
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      ],
      "glosses": [
        "The anterior prolongation of the guard of the phragmocone of belemnites and allied fossil cephalopods, whether horny or calcareous."
      ],
      "id": "en-proostracum-en-noun-L~x074z9",
      "links": [
        [
          "zoology",
          "zoology"
        ],
        [
          "anterior",
          "anterior"
        ],
        [
          "prolongation",
          "prolongation"
        ],
        [
          "guard",
          "guard"
        ],
        [
          "phragmocone",
          "phragmocone"
        ],
        [
          "belemnite",
          "belemnite"
        ],
        [
          "fossil",
          "fossil"
        ],
        [
          "cephalopod",
          "cephalopod"
        ],
        [
          "horny",
          "horny"
        ],
        [
          "calcareous",
          "calcareous"
        ]
      ],
      "raw_glosses": [
        "(zoology) The anterior prolongation of the guard of the phragmocone of belemnites and allied fossil cephalopods, whether horny or calcareous."
      ],
      "topics": [
        "biology",
        "natural-sciences",
        "zoology"
      ]
    }
  ],
  "word": "proostracum"
}

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    {
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        "1": "en",
        "2": "grc",
        "3": "προ-",
        "4": "",
        "5": "before"
      },
      "expansion": "Ancient Greek προ- (pro-, “before”)",
      "name": "uder"
    }
  ],
  "etymology_text": "From Ancient Greek προ- (pro-, “before”) + ὄστρᾰκον (óstrakon, “shell”).",
  "forms": [
    {
      "form": "proostraca",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
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      "expansion": "proostracum (plural proostraca)",
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  "lang_code": "en",
  "pos": "noun",
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      "glosses": [
        "The anterior prolongation of the guard of the phragmocone of belemnites and allied fossil cephalopods, whether horny or calcareous."
      ],
      "links": [
        [
          "zoology",
          "zoology"
        ],
        [
          "anterior",
          "anterior"
        ],
        [
          "prolongation",
          "prolongation"
        ],
        [
          "guard",
          "guard"
        ],
        [
          "phragmocone",
          "phragmocone"
        ],
        [
          "belemnite",
          "belemnite"
        ],
        [
          "fossil",
          "fossil"
        ],
        [
          "cephalopod",
          "cephalopod"
        ],
        [
          "horny",
          "horny"
        ],
        [
          "calcareous",
          "calcareous"
        ]
      ],
      "raw_glosses": [
        "(zoology) The anterior prolongation of the guard of the phragmocone of belemnites and allied fossil cephalopods, whether horny or calcareous."
      ],
      "topics": [
        "biology",
        "natural-sciences",
        "zoology"
      ]
    }
  ],
  "word": "proostracum"
}