Relating to or characteristic of bibliomania or a bibliomaniac; obsessed with collecting books to an extreme degree.
From bibliomaniac + -al (Latin -alis, adjective-forming suffix). A rare adjectival form that emerged in the 19th century to describe the attitudes and behaviors of book collecting obsessives.
A bibliomaniacal collector might buy an entire library's worth of books in a single estate auction without any real plan for them—the compulsion to collect overwhelms practical concerns.
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