/ ˌθɜːˈtiːn; NAmE ˌθɜːrˈt-/ number 13
► thir·teenth / ˌθɜːˈtiːnθ; NAmE ˌθɜːrˈt-/ ordinal number , noun
HELP NOTE : There are examples of how to use ordinal numbers at the entry for fifth .
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WORD ORIGIN
Old English thrēotīene (from three and -teen ). The spelling with initial thi- is recorded in late Middle English .