A rigid airship first designed in Germany by Count (Graf) Ferdinand von Zeppelin in the 1870s. The Hindenburg (LZ 129) is the most famous example. It's crash on 06 May 1937 essentially ended the era of large Zeppelins for commercial transport.
LZ is a German abbreviation for Luftfahrzeug.
The Goodyear Blimp is a modern version of a Zeppelin, but unlike the Hindenburg, is much smaller and filled with inert helium instead of flammable hydrogen.