"jth" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "j",
        "3": "th"
      },
      "expansion": "j + -th",
      "name": "suffix"
    }
  ],
  "etymology_text": "From j + -th.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "jth (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "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 terms suffixed with -th",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Mathematics",
          "orig": "en:Mathematics",
          "parents": [
            "Formal sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2009 February, W. B. Raymond Lickorish, “WHAT IS... a Skein Module?”, in Notices of the American Mathematical Society, volume 56, number 2, →ISSN, page 242:",
          "text": "An arc labelled a over-crossing one labelled b has jᵗʰ coordinate (-1)#x5C;frac#x7B;a#x2B;b-j#x7D;#x7B;2#x7D;#x5C;Delta#x5F;j#x5C;theta(a,b,j)#x7B;-1#x7D;A#x7B;a#x2B;b-j#x2B;(a²#x2B;b²-j²)#x2F;2#x7D; with respect to base #x5C;#x7B;#x5B;(a,b)j(a,b)#x5D;#x5C;#x7D;.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Occurring at position j in a sequence."
      ],
      "id": "en-jth-en-adj-HytUtyVk",
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "sequence",
          "sequence"
        ]
      ],
      "raw_glosses": [
        "(mathematics) Occurring at position j in a sequence."
      ],
      "related": [
        {
          "word": "ith"
        },
        {
          "word": "nth"
        }
      ],
      "synonyms": [
        {
          "word": "Sometimes written as j'th"
        },
        {
          "word": "j-th"
        }
      ],
      "tags": [
        "not-comparable"
      ],
      "topics": [
        "mathematics",
        "sciences"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/d͡ʒeɪθ/"
    },
    {
      "rhymes": "-eɪθ"
    }
  ],
  "word": "jth"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "j",
        "3": "th"
      },
      "expansion": "j + -th",
      "name": "suffix"
    }
  ],
  "etymology_text": "From j + -th.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "jth (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "related": [
    {
      "word": "ith"
    },
    {
      "word": "nth"
    }
  ],
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English terms suffixed with -th",
        "English terms with quotations",
        "English uncomparable adjectives",
        "English words without vowels",
        "Pages with 1 entry",
        "Pages with entries",
        "Rhymes:English/eɪθ",
        "Rhymes:English/eɪθ/1 syllable",
        "en:Mathematics"
      ],
      "examples": [
        {
          "ref": "2009 February, W. B. Raymond Lickorish, “WHAT IS... a Skein Module?”, in Notices of the American Mathematical Society, volume 56, number 2, →ISSN, page 242:",
          "text": "An arc labelled a over-crossing one labelled b has jᵗʰ coordinate (-1)#x5C;frac#x7B;a#x2B;b-j#x7D;#x7B;2#x7D;#x5C;Delta#x5F;j#x5C;theta(a,b,j)#x7B;-1#x7D;A#x7B;a#x2B;b-j#x2B;(a²#x2B;b²-j²)#x2F;2#x7D; with respect to base #x5C;#x7B;#x5B;(a,b)j(a,b)#x5D;#x5C;#x7D;.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Occurring at position j in a sequence."
      ],
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "sequence",
          "sequence"
        ]
      ],
      "raw_glosses": [
        "(mathematics) Occurring at position j in a sequence."
      ],
      "tags": [
        "not-comparable"
      ],
      "topics": [
        "mathematics",
        "sciences"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/d͡ʒeɪθ/"
    },
    {
      "rhymes": "-eɪθ"
    }
  ],
  "synonyms": [
    {
      "word": "Sometimes written as j'th"
    },
    {
      "word": "j-th"
    }
  ],
  "word": "jth"
}