1) Gas meter 2) Meter 
instrument for holding and measuring gases
• (n.) An apparatus for holding and measuring of gas; in gas works, a huge iron cylinder closed at one end and having the other end immersed in water, in which it is made to rise or fall, according to the volume of gas it contains, or the pressure required.
Gas·om'e·ter noun [ Gas + -meter . Confer French gazomètre .] An apparatus for holding and measuring of gas; in gas works, a huge iron cylinder closed at one end and having the other end immersed in water, in which it is made to rise or fall, according to the volume of gas it cont...
Type: Term Pronunciation: gas-om′ĕ-tĕr Definitions: 1. A calibrated instrument or vessel for measuring the volumes of gases.