instrument for measuring volume of a solid
• (n.) An instrument for measuring the volume of a body, especially a solid, by means of the difference in tension caused by its presence and absence in a confined portion of air.
Vol`u·me·nom'e·ter noun [ Latin volumen volume + -meter .] (Physics) An instrument for measuring the volume of a body, especially a solid, by means of the difference in tension caused by its presence and absence in a confined portion of air. 
Type: Term Pronunciation: vol′yū-mĕ-nom′ĕ-tĕr Definitions: 1. A device for determining the volume of a solid by measuring the amount of liquid it displaces. Synonyms: volumometer