Airometer

• (n.) A hollow cylinder to contain air. It is closed above and open below, and has its open end plunged into water.
Found on http://thinkexist.com/dictionary/meaning/airometer/

Airometer

Air·om'e·ter noun [ Air + - meter .] A hollow cylinder to contain air. It is closed above and open below, and has its open end plunged into water.
Found on http://www.encyclo.co.uk/webster/A/48
No exact match found