A page before the title-page containing the book's title but no title-page details(noun)
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Use "half-title" in a sentence
"The tissue guard shows some age-related tanning, with slight offsetting to the title-page light tanning to endpapers, half-title, page edges; light wear to the spine ends, light wear to the title label, a small buckle to the cloth on the upper left of the back cover, some light fading, tanning to the spine and cover margins."
"Shows some signs of wear and is no longer fresh about 3 hours ago from web first binding with two free end papers prior to the half-title."
"Rose's inscription on the half-title page -- El. Rose/Kilravock"