al·​com·​e·​ter | \ al-ˈkä-mə-tər \
plural alcometers

Definition of alcometer

: a device used by police to measure the alcohol content in a breath sample in order to determine if a person is legally drunk … a police alcometer indicated alcohol had been detected on his breath— Jennifer Cooke, Sydney (Australia) Morning Herald, 14 Mar. 2009 — compare breathalyzer

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

First Known Use of alcometer

1941, in the meaning defined above

History and Etymology for alcometer

formerly a registered trademark

Keep scrolling for more

Learn More about alcometer

Statistics for alcometer

Look-up Popularity

Time Traveler for alcometer

The first known use of alcometer was in 1941

See more words from the same year

Comments on alcometer

What made you want to look up alcometer? Please tell us where you read or heard it (including the quote, if possible).


to express emotion in a dramatic way

Get Word of the Day daily email!

Test Your Vocabulary

What did you just call me?! A Quiz

  • rows-of-various-emoji
  • If a member of the audience describes your speech as bombastic, does that person mean it is:
Name That Thing

Test your visual vocabulary with our 10-question challenge!

Dictionary Devil

Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!