"rau câu" meaning in Vietnamese

{
  "etymology_templates": [
    {
      "args": {
        "1": "vi",
        "2": "rau",
        "3": "câu",
        "t1": "leaf vegetable",
        "t2": "*the name of the plant"
      },
      "expansion": "rau (“leaf vegetable”) + câu (“*the name of the plant”)",
      "name": "com"
    },
    {
      "args": {
        "1": "Gracilaria",
        "2": "genus"
      },
      "expansion": "Gracilaria",
      "name": "taxfmt"
    }
  ],
  "etymology_text": "From rau (“leaf vegetable”) + câu (“*the name of the plant”). The term was originally used to refer to plants of the genus Gracilaria, and later to jelly. It is possible that these plants are a source of agar - a gelatin substitute in jelly.",
  "head_templates": [
    {
      "args": {
        "1": "vi",
        "2": "noun",
        "3": "",
        "4": "",
        "head": "",
        "tr": ""
      },
      "expansion": "rau câu",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "rau câu",
      "name": "vi-noun"
    }
  ],
  "lang": "Vietnamese",
  "lang_code": "vi",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Southern Vietnamese",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "jelly (dessert)"
      ],
      "id": "en-rau_câu-vi-noun-gx8MRcZx",
      "links": [
        [
          "jelly",
          "jelly"
        ]
      ],
      "raw_glosses": [
        "(Southern Vietnam) jelly (dessert)"
      ],
      "tags": [
        "Southern",
        "Vietnam"
      ]
    },
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "vi",
          "name": "Botany",
          "orig": "vi:Botany",
          "parents": [
            "Biology",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "_dis": "3 97",
          "kind": "other",
          "name": "Vietnamese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "14 86",
          "kind": "other",
          "name": "Vietnamese nouns without classifiers",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "Gracilaria"
      ],
      "id": "en-rau_câu-vi-noun-bDkXkvfC",
      "links": [
        [
          "botany",
          "botany"
        ],
        [
          "Gracilaria",
          "Gracilaria#Translingual"
        ]
      ],
      "raw_glosses": [
        "(botany) Gracilaria"
      ],
      "topics": [
        "biology",
        "botany",
        "natural-sciences"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[zaw˧˧ kəw˧˧]",
      "tags": [
        "Hà-Nội"
      ]
    },
    {
      "ipa": "[ʐaw˧˧ kəw˧˧]",
      "tags": [
        "Huế"
      ]
    },
    {
      "ipa": "[ɹa(ː)w˧˧ kəw˧˧]",
      "tags": [
        "Hồ-Chí-Minh-City"
      ]
    }
  ],
  "synonyms": [
    {
      "_dis1": "0 0",
      "word": "thạch"
    }
  ],
  "word": "rau câu"
}

{
  "categories": [
    "Vietnamese compound terms",
    "Vietnamese entries with incorrect language header",
    "Vietnamese lemmas",
    "Vietnamese nouns",
    "Vietnamese nouns without classifiers",
    "Vietnamese terms with IPA pronunciation"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "vi",
        "2": "rau",
        "3": "câu",
        "t1": "leaf vegetable",
        "t2": "*the name of the plant"
      },
      "expansion": "rau (“leaf vegetable”) + câu (“*the name of the plant”)",
      "name": "com"
    },
    {
      "args": {
        "1": "Gracilaria",
        "2": "genus"
      },
      "expansion": "Gracilaria",
      "name": "taxfmt"
    }
  ],
  "etymology_text": "From rau (“leaf vegetable”) + câu (“*the name of the plant”). The term was originally used to refer to plants of the genus Gracilaria, and later to jelly. It is possible that these plants are a source of agar - a gelatin substitute in jelly.",
  "head_templates": [
    {
      "args": {
        "1": "vi",
        "2": "noun",
        "3": "",
        "4": "",
        "head": "",
        "tr": ""
      },
      "expansion": "rau câu",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "rau câu",
      "name": "vi-noun"
    }
  ],
  "lang": "Vietnamese",
  "lang_code": "vi",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Southern Vietnamese"
      ],
      "glosses": [
        "jelly (dessert)"
      ],
      "links": [
        [
          "jelly",
          "jelly"
        ]
      ],
      "raw_glosses": [
        "(Southern Vietnam) jelly (dessert)"
      ],
      "tags": [
        "Southern",
        "Vietnam"
      ]
    },
    {
      "categories": [
        "vi:Botany"
      ],
      "glosses": [
        "Gracilaria"
      ],
      "links": [
        [
          "botany",
          "botany"
        ],
        [
          "Gracilaria",
          "Gracilaria#Translingual"
        ]
      ],
      "raw_glosses": [
        "(botany) Gracilaria"
      ],
      "topics": [
        "biology",
        "botany",
        "natural-sciences"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[zaw˧˧ kəw˧˧]",
      "tags": [
        "Hà-Nội"
      ]
    },
    {
      "ipa": "[ʐaw˧˧ kəw˧˧]",
      "tags": [
        "Huế"
      ]
    },
    {
      "ipa": "[ɹa(ː)w˧˧ kəw˧˧]",
      "tags": [
        "Hồ-Chí-Minh-City"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "thạch"
    }
  ],
  "word": "rau câu"
}