"cosin" meaning in Welsh

{
  "etymology_templates": [
    {
      "args": {
        "1": "cy",
        "2": "en",
        "3": "cosine"
      },
      "expansion": "English cosine",
      "name": "bor"
    }
  ],
  "etymology_text": "Adapted from English cosine.",
  "forms": [
    {
      "form": "cosinau",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m",
        "2": "au"
      },
      "expansion": "cosin m (plural cosinau)",
      "name": "cy-noun"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 4 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Welsh entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "cy",
          "name": "Differential geometry",
          "orig": "cy:Differential geometry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "cy",
          "name": "Mathematics",
          "orig": "cy:Mathematics",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "cosine"
      ],
      "id": "en-cosin-cy-noun-rZiXoRXP",
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "differential geometry",
          "differential geometry"
        ],
        [
          "cosine",
          "cosine"
        ]
      ],
      "qualifier": "differential geometry",
      "raw_glosses": [
        "(mathematics, differential geometry) cosine"
      ],
      "related": [
        {
          "topics": [
            "trigonometry",
            "mathematics",
            "sciences"
          ],
          "word": "trigonometreg"
        },
        {
          "english": "sine",
          "translation": "sine",
          "word": "sin"
        },
        {
          "english": "tangent",
          "translation": "tangent",
          "word": "tangiad"
        }
      ],
      "synonyms": [
        {
          "word": "cysein"
        }
      ],
      "tags": [
        "masculine"
      ],
      "topics": [
        "mathematics",
        "sciences"
      ]
    }
  ],
  "word": "cosin"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "cy",
        "2": "en",
        "3": "cosine"
      },
      "expansion": "English cosine",
      "name": "bor"
    }
  ],
  "etymology_text": "Adapted from English cosine.",
  "forms": [
    {
      "form": "cosinau",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m",
        "2": "au"
      },
      "expansion": "cosin m (plural cosinau)",
      "name": "cy-noun"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "noun",
  "related": [
    {
      "topics": [
        "trigonometry",
        "mathematics",
        "sciences"
      ],
      "word": "trigonometreg"
    },
    {
      "english": "sine",
      "translation": "sine",
      "word": "sin"
    },
    {
      "english": "tangent",
      "translation": "tangent",
      "word": "tangiad"
    }
  ],
  "senses": [
    {
      "categories": [
        "Pages with 4 entries",
        "Pages with entries",
        "Welsh countable nouns",
        "Welsh entries with incorrect language header",
        "Welsh lemmas",
        "Welsh masculine nouns",
        "Welsh nouns",
        "Welsh nouns with red links in their headword lines",
        "Welsh terms borrowed from English",
        "Welsh terms derived from English",
        "cy:Differential geometry",
        "cy:Mathematics"
      ],
      "glosses": [
        "cosine"
      ],
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "differential geometry",
          "differential geometry"
        ],
        [
          "cosine",
          "cosine"
        ]
      ],
      "qualifier": "differential geometry",
      "raw_glosses": [
        "(mathematics, differential geometry) cosine"
      ],
      "synonyms": [
        {
          "word": "cysein"
        }
      ],
      "tags": [
        "masculine"
      ],
      "topics": [
        "mathematics",
        "sciences"
      ]
    }
  ],
  "word": "cosin"
}