English ordinal numbers may function as either an adjective or as a noun, and almost never appear in the plural.
"ninety-first." YourDictionary, n.d. Web. 14 January 2019. <https://www.yourdictionary.com/ninety-first>.
ninety-first. (n.d.). Retrieved January 14th, 2019, from https://www.yourdictionary.com/ninety-first
Yes, I'd like to receive Word of the Day emails from YourDictionary.com
By continuing, you agree to our
Please set a username for yourself.
People will see it as Author Name with your public flash cards.