an instrument for measuring the relative density of a liquid, usually consisting of a sealed graduated tube with a weighted bulb on one end, the relative density being indicated by the length of the unsubmerged stem
WordReference Random House Unabridged Dictionary of American English © 2025
hy•drom•e•ter
(hī drom′i tər),USA pronunciation n.
hy•dro•met•ric
(hī′drə me′trik),USA pronunciation hy′dro•met′ri•cal, adj.
hy•drom′e•try, n.
- an instrument for determining the specific gravity of a liquid, commonly consisting of a graduated tube weighted to float upright in the liquid whose specific gravity is being measured.
- 1665–75; hydro-1 + meter
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'hydrometer' also found in these entries (note: many are not synonyms or translations):