Gasometer
/ɡæˈsɑːmɪtər/
Definition 1 of 1
Pro Tip 1/3Historical Usage
Gasometers were common in the 19th century; now they're rare and often historical landmarks. 
The Victorian gasometer in the city has been preserved for its historical significance.
Pro Tip 2/3Obsolete Technology
Modern equivalents of gasometers use improved technology and are not typically called gasometers. 
Even though we have modern natural gas facilities, some old maps still show the location of an ancient gasometer.
Pro Tip 3/3Size Implication
The term implies a very large size, much bigger than what you'd use or see in a household setting. 
Two gasometers that towered over the city have been turned into an art exhibition space.