half title

noun

Also called bastard title. the first printed page of certain books, appearing after the end papers and before the title page and containing only the title of the book.
the title of any subdivision of a book when printed on a full page by itself.

Origin of half title

First recorded in 1875–80

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018