Fortyninth

Forty-ninth is the ordinal form of the cardinal number forty-nine in English, used to indicate a position in a sequence. It is usually written with a hyphen as forty-ninth, and in numerical form it appears as 49th. The nonstandard unhyphenated variant fortyninth is rare in contemporary writing, though you might encounter it in certain proper names or historical texts.

Etymology and form: The term combines the base number forty with the ordinal suffix that yields the ordinal form, ninth. The components have deep roots in the history of English: forty comes from older Germanic forms and ninth from the ordinal of nine. The hyphen helps readability in longer compound numbers and is standard in modern orthography.

Usage: Fortyninth denotes the item in the forty-ninth position within a sequence, such as lists, chapters, or rankings. In mathematics or statistics, the fact that 49 is a perfect square (7 squared) is a separate property of the numeral, not intrinsic to the ordinal itself. In geography and street naming, one may encounter Forty-Ninth Street or Forty-Ninth Avenue in the United States and Canada. A related term is the Forty-Ninth parallel north, a historic boundary line between the United States and Canada.

Overall, forty-ninth is the conventional English spelling for describing the position after the fortieth and before the fiftieth, with hyphenation standard in most modern usage.