"brom-" meaning in Welsh

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  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "prefix",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "(“containing bromine”), used before a vowel",
          "word": "bromo-"
        }
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        {
          "kind": "other",
          "langcode": "cy",
          "name": "Bromine",
          "orig": "cy:Bromine",
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        }
      ],
      "glosses": [
        "Alternative form of bromo- (“containing bromine”), used before a vowel"
      ],
      "id": "en-brom--cy-prefix-nYXbJw9v",
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          "organic chemistry",
          "organic chemistry"
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      "raw_glosses": [
        "(organic chemistry) Alternative form of bromo- (“containing bromine”), used before a vowel"
      ],
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        "physical-sciences"
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    }
  ],
  "word": "brom-"
}

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      "expansion": "brom-",
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  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "prefix",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "(“containing bromine”), used before a vowel",
          "word": "bromo-"
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      "glosses": [
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          "organic chemistry"
        ],
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          "bromo-",
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        ]
      ],
      "raw_glosses": [
        "(organic chemistry) Alternative form of bromo- (“containing bromine”), used before a vowel"
      ],
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        "alternative",
        "morpheme"
      ],
      "topics": [
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  ],
  "word": "brom-"
}