thirty-oneth

thirty-oneth (not comparable)

1. (nonstandard) thirty-first

thirty-oneth (plural thirty-oneths)

1. A fractional part of which thirty-one make up a whole
   • about twenty thirty-oneths in value of such sales being made as hereinafter mentioned to a syndicate of persons in the United Kingdom, about seven thirty-oneths to residents in the United States, and about four thirty-oneths to residents in other European countries and the colonies. —"Brooke & Co. (Limited) v. Commissioners of Inland Revenue". In The Weekly Reporter, vol. XLIV, p. 671, August 15, 1896. Supreme Court of Judicature, House of Lords, London.

• thirty-first