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Definition of hydrometer

hydrometer

/haɪˈdrɑː.mə.tɚ/
hy · drom · e · ter
Adverb:hydrometrically
•
Plural:hydrometers
•
Adjective:hydrometric
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hydrometer Lexical Profile

hydrometer Game Scores & Validity

• noun

1

An instrument, typically consisting of a sealed glass tube with a weighted bottom, used to measure the specific gravity or relative density of liquids based on the concept of buoyancy.

Example

"The brewer used a hydrometer to check the specific gravity of the fermenting beer to determine its alcohol content."

Synonyms
View all synonyms for hydrometer

Word Nuance & Usage

A hydrometer is easily confused with a 'hygrometer'; while a hydrometer measures the density of liquids, a hygrometer measures the moisture content or humidity of the air.

• Rhymes for hydrometer

• Nearby Words

hydrofoil
hydrogen
hydromassage
hydrometer
hydrophobia
hydrophobic
hydroplane

Word Origin & Etymology

Derived from the Greek 'hudōr' (water) and 'metron' (measure), combining to describe an instrument that measures fluid properties. It came into English usage in the late 17th century.

Usage Trend

Historical frequency of usage in published text.

180019102020
Data source: Google Books Ngram Viewer

Cite this Entry

Wordmom. (2026). Definition of Hydrometer. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/hydrometer
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