"alabastr" meaning in Breton

{
  "categories": [
    {
      "kind": "other",
      "name": "Noms communs en breton",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Breton",
      "orig": "breton",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Mentionné dans le grand dictionnaire de François Vallée (1931, page 18a) : alabastr, maen-glan m. pl. mein-, glanvaen m."
  ],
  "lang": "Breton",
  "lang_code": "br",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "glosses": [
        "Albâtre."
      ],
      "id": "fr-alabastr-br-noun-oQvUyORq"
    }
  ],
  "sounds": [
    {
      "ipa": "\\aˈlɑː.bastʳ\\"
    }
  ],
  "synonyms": [
    {
      "word": "glanvaen"
    },
    {
      "word": "maen-glan"
    }
  ],
  "tags": [
    "masculine"
  ],
  "word": "alabastr"
}

{
  "categories": [
    "Noms communs en breton",
    "breton"
  ],
  "etymology_texts": [
    "Mentionné dans le grand dictionnaire de François Vallée (1931, page 18a) : alabastr, maen-glan m. pl. mein-, glanvaen m."
  ],
  "lang": "Breton",
  "lang_code": "br",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "glosses": [
        "Albâtre."
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\aˈlɑː.bastʳ\\"
    }
  ],
  "synonyms": [
    {
      "word": "glanvaen"
    },
    {
      "word": "maen-glan"
    }
  ],
  "tags": [
    "masculine"
  ],
  "word": "alabastr"
}