1) Acetometer 
instrument for measuring strength of vinegar
• (n.) An instrument for estimating the amount of acetic acid in vinegar or in any liquid containing acetic acid.
Ac`e·tim'e·ter noun [ Latin acetum vinegar + -meter : confer French acétimètre .] An instrument for estimating the amount of acetic acid in vinegar or in any liquid containing acetic acid. 
Type: Term Pronunciation: as-ĕ-tim′ĕ-ter Definitions: 1. An apparatus for determining the content of acetic acid in vinegar or other fluids. Synonyms: acetometer
acetimeter, acetometer An instrument for estimating the amount of acetic acid in vinegar or in any liquid containing acetic acid.