Definition of bonzoline in English:

bonzoline

Pronunciation /ˈbɒnzəliːn/

noun

historical
  • A celluloid composite material, used to manufacture billiard balls.

    In the 19th century, billiard balls were chiefly made from ivory. Bonzoline was developed as a cheaper substitute.

Origin

Late 19th century; earliest use found in Sporting Life (Philadelphia). Apparently from a first element probably of arbitrary origin + -ol + -ine.