"pentaphthong" meaning in English

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        "2": "penta-",
        "alt2": "-phthong"
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      "expansion": "penta- + -phthong",
      "name": "af"
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  "etymology_text": "From penta- + -phthong, by analogy with diphthong, triphthong.",
  "forms": [
    {
      "form": "pentaphthongs",
      "tags": [
        "plural"
      ]
    }
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  "lang_code": "en",
  "pos": "noun",
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          "source": "w"
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      ],
      "coordinate_terms": [
        {
          "word": "monophthong"
        },
        {
          "word": "diphthong"
        },
        {
          "word": "triphthong"
        },
        {
          "word": "tetraphthong"
        }
      ],
      "examples": [
        {
          "ref": "1866, Caleb Bates Josselyn, Elements of Pronunciation […], page 53:",
          "text": "Fifty-six diphthongal combinations may be made from the eight vowel elements, four of which, though, we find to be necessarily triphthongs, two tetraphthongs, and one a pentaphthong.",
          "type": "quote"
        },
        {
          "ref": "1992 February 4, Graham Toal, “Vowel Raising Before Nasals”, in bit.listserv.words-l (Usenet):",
          "text": "Try saying the Dutch word Leeuwen some time. At least a pentaphthong...",
          "type": "quote"
        },
        {
          "ref": "1993 December 23, Bob Simmonds, “Seamed phthongs”, in bit.listserv.words-l (Usenet):",
          "text": "Someone once claimed that Pres. Coolidge ( a Vermonter) pronounced the vowel in \"cow\" as a pentaphthong.",
          "type": "quote"
        },
        {
          "ref": "2008 June 17, Ruud Harmsen, “British English \"Joshua is\"”, in sci.lang (Usenet):",
          "text": "Phonetically, [j] is meaningless, it's the same as an [i]. So what we have here is a pentaphthong: ui@iu.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A sequence of five vowels pronounced as, or almost as, a single syllable."
      ],
      "id": "en-pentaphthong-en-noun-sTStOpYQ",
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      "raw_glosses": [
        "(phonetics, rare) A sequence of five vowels pronounced as, or almost as, a single syllable."
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  "word": "pentaphthong"
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{
  "coordinate_terms": [
    {
      "word": "monophthong"
    },
    {
      "word": "diphthong"
    },
    {
      "word": "triphthong"
    },
    {
      "word": "tetraphthong"
    }
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    }
  ],
  "etymology_text": "From penta- + -phthong, by analogy with diphthong, triphthong.",
  "forms": [
    {
      "form": "pentaphthongs",
      "tags": [
        "plural"
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    }
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          "ref": "1866, Caleb Bates Josselyn, Elements of Pronunciation […], page 53:",
          "text": "Fifty-six diphthongal combinations may be made from the eight vowel elements, four of which, though, we find to be necessarily triphthongs, two tetraphthongs, and one a pentaphthong.",
          "type": "quote"
        },
        {
          "ref": "1992 February 4, Graham Toal, “Vowel Raising Before Nasals”, in bit.listserv.words-l (Usenet):",
          "text": "Try saying the Dutch word Leeuwen some time. At least a pentaphthong...",
          "type": "quote"
        },
        {
          "ref": "1993 December 23, Bob Simmonds, “Seamed phthongs”, in bit.listserv.words-l (Usenet):",
          "text": "Someone once claimed that Pres. Coolidge ( a Vermonter) pronounced the vowel in \"cow\" as a pentaphthong.",
          "type": "quote"
        },
        {
          "ref": "2008 June 17, Ruud Harmsen, “British English \"Joshua is\"”, in sci.lang (Usenet):",
          "text": "Phonetically, [j] is meaningless, it's the same as an [i]. So what we have here is a pentaphthong: ui@iu.",
          "type": "quote"
        }
      ],
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        "A sequence of five vowels pronounced as, or almost as, a single syllable."
      ],
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      "raw_glosses": [
        "(phonetics, rare) A sequence of five vowels pronounced as, or almost as, a single syllable."
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  "word": "pentaphthong"
}