vəˈlüməd.ə(r), -mətə- also vəlˈyü- or välˈyü-; ˈvälyəˌmēd.ə(r), -ētə- noun
Etymology: International Scientific Vocabulary, blend of volume (I) and -meter
: an instrument for measuring volumes (as of gases or liquids) directly or (as of solids) by displacement of a liquid