Definition from Wiktionary, the free dictionary
Late 18th century, from Greek: eúdio(s) 'clear, fine', from eu 'well' + dios 'heavenly'
eudiometer (plural eudiometers)
- A graduated glass tube closed at one end that is used for measuring the change in the volume of gases during a chemical reaction.
tube for measuring volume of gases
SAT Subject Test in Chemistry (Barron's How to Prepare for the SAT)
From Alchemy to Chemistry in Picture and Story