chyometer

from The Century Dictionary.

• noun An instrument for measuring the volume of a liquid by the amount expelled by a piston moving in a tube containing the liquid, the quantity being indicated by a graduation on the piston.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Chem.) An instrument for measuring liquids. It consists of a piston moving in a tube in which is contained the liquid, the quantity expelled being indicated by the graduation upon the piston rod.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun chemistry An instrument for measuring liquids, consisting of a tube with a piston inside.