"in tan" meaning in Old Irish

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "mga",
            "2": "in tan"
          },
          "expansion": "Middle Irish: in tan\nIrish: an tan",
          "name": "desctree"
        }
      ],
      "text": "Middle Irish: in tan\nIrish: an tan"
    }
  ],
  "etymology_text": "Originally the accusative singular of tan (“(point in) time”) after the definite article; thus literally, ‘(at) the time (that)’. The alternative form in tain is older; in tan has been depalatalized in proclitic position.",
  "head_templates": [
    {
      "args": {
        "1": "sga",
        "2": "conjunction",
        "3": "followed by the indirect relative"
      },
      "expansion": "in tan (followed by the indirect relative)",
      "name": "head"
    }
  ],
  "lang": "Old Irish",
  "lang_code": "sga",
  "pos": "conj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Old Irish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "when"
      ],
      "head_nr": 1,
      "id": "en-in_tan-sga-conj-FeqnUkCu",
      "links": [
        [
          "when",
          "when"
        ]
      ],
      "synonyms": [
        {
          "word": "in tain"
        }
      ],
      "wikipedia": [
        "D. A. Binchy",
        "Osborn Bergin"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/in͈ˈtan/"
    }
  ],
  "word": "in tan"
}

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "mga",
            "2": "in tan"
          },
          "expansion": "Middle Irish: in tan\nIrish: an tan",
          "name": "desctree"
        }
      ],
      "text": "Middle Irish: in tan\nIrish: an tan"
    }
  ],
  "etymology_text": "Originally the accusative singular of tan (“(point in) time”) after the definite article; thus literally, ‘(at) the time (that)’. The alternative form in tain is older; in tan has been depalatalized in proclitic position.",
  "head_templates": [
    {
      "args": {
        "1": "sga",
        "2": "conjunction",
        "3": "followed by the indirect relative"
      },
      "expansion": "in tan (followed by the indirect relative)",
      "name": "head"
    }
  ],
  "lang": "Old Irish",
  "lang_code": "sga",
  "pos": "conj",
  "senses": [
    {
      "categories": [
        "Old Irish conjunctions",
        "Old Irish entries with incorrect language header",
        "Old Irish lemmas",
        "Old Irish multiword terms",
        "Old Irish terms with IPA pronunciation"
      ],
      "glosses": [
        "when"
      ],
      "head_nr": 1,
      "links": [
        [
          "when",
          "when"
        ]
      ],
      "wikipedia": [
        "D. A. Binchy",
        "Osborn Bergin"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/in͈ˈtan/"
    }
  ],
  "synonyms": [
    {
      "word": "in tain"
    }
  ],
  "word": "in tan"
}

{
  "called_from": "form_descriptions/1698",
  "msg": "unrecognized head form: followed by the indirect relative",
  "path": [
    "in tan"
  ],
  "section": "Old Irish",
  "subsection": "conjunction",
  "title": "in tan",
  "trace": ""
}

{
  "called_from": "page/1713/20221215",
  "msg": "later head without list of senses,template node #, in tan/Old Irish",
  "path": [
    "in tan"
  ],
  "section": "Old Irish",
  "subsection": "conjunction",
  "title": "in tan",
  "trace": ""
}