"water-lettuce" meaning in English

{
  "forms": [
    {
      "form": "water-lettuces",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "water-lettuce (plural water-lettuces)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "lifeform",
          "langcode": "en",
          "name": "Arum family plants",
          "orig": "en:Arum family plants",
          "parents": [
            "Alismatales order plants",
            "Water plants",
            "Plants",
            "Lifeforms",
            "All topics",
            "Life",
            "Fundamental",
            "Nature"
          ],
          "source": "w"
        },
        {
          "kind": "lifeform",
          "langcode": "en",
          "name": "Water plants",
          "orig": "en:Water plants",
          "parents": [
            "Plants",
            "Lifeforms",
            "All topics",
            "Life",
            "Fundamental",
            "Nature"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "taxonomic": "Spodoptera pectinicornis",
          "word": "water-lettuce moth"
        }
      ],
      "glosses": [
        "Tropical duckweed, water lettuce (Pistia stratiotes)."
      ],
      "id": "en-water-lettuce-en-noun-EXmmi096",
      "links": [
        [
          "water lettuce",
          "water lettuce"
        ]
      ],
      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "tropical duckweed",
          "word": "pistia"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "tropical duckweed",
          "word": "vesisalaatti"
        },
        {
          "code": "lo",
          "lang": "Lao",
          "roman": "chǭk",
          "sense": "tropical duckweed",
          "word": "ຈອກ"
        },
        {
          "code": "pt",
          "lang": "Portuguese",
          "sense": "tropical duckweed",
          "tags": [
            "feminine"
          ],
          "word": "alface-d'água"
        },
        {
          "code": "pt",
          "lang": "Portuguese",
          "sense": "tropical duckweed",
          "tags": [
            "feminine"
          ],
          "word": "flor-d'água"
        },
        {
          "code": "th",
          "lang": "Thai",
          "roman": "jɔ̀ɔk",
          "sense": "tropical duckweed",
          "word": "จอก"
        },
        {
          "code": "vi",
          "lang": "Vietnamese",
          "sense": "tropical duckweed",
          "word": "bèo cái"
        }
      ]
    }
  ],
  "word": "water-lettuce"
}

{
  "derived": [
    {
      "taxonomic": "Spodoptera pectinicornis",
      "word": "water-lettuce moth"
    }
  ],
  "forms": [
    {
      "form": "water-lettuces",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "water-lettuce (plural water-lettuces)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with topic categories using raw markup",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with non-redundant non-automated sortkeys",
        "Entries missing English vernacular names of taxa",
        "Entries using missing taxonomic name (species)",
        "en:Arum family plants",
        "en:Water plants"
      ],
      "glosses": [
        "Tropical duckweed, water lettuce (Pistia stratiotes)."
      ],
      "links": [
        [
          "water lettuce",
          "water lettuce"
        ]
      ]
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "tropical duckweed",
      "word": "pistia"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "tropical duckweed",
      "word": "vesisalaatti"
    },
    {
      "code": "lo",
      "lang": "Lao",
      "roman": "chǭk",
      "sense": "tropical duckweed",
      "word": "ຈອກ"
    },
    {
      "code": "pt",
      "lang": "Portuguese",
      "sense": "tropical duckweed",
      "tags": [
        "feminine"
      ],
      "word": "alface-d'água"
    },
    {
      "code": "pt",
      "lang": "Portuguese",
      "sense": "tropical duckweed",
      "tags": [
        "feminine"
      ],
      "word": "flor-d'água"
    },
    {
      "code": "th",
      "lang": "Thai",
      "roman": "jɔ̀ɔk",
      "sense": "tropical duckweed",
      "word": "จอก"
    },
    {
      "code": "vi",
      "lang": "Vietnamese",
      "sense": "tropical duckweed",
      "word": "bèo cái"
    }
  ],
  "word": "water-lettuce"
}