ful·​chronograph | \ (ˈ)fu̇l, ¦fəl+ \

Definition of fulchronograph

: a lightning-recording device that consists of a revolving aluminum disk having on its rim several hundred steel fins which, as they pass successively every forty-millionth of a second between two coils carrying the surge current of a lightning stroke, become proportionately magnetized and register the duration and intensity of the strokes

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!

History and Etymology for fulchronograph

Latin fulgur lightning (from fulgēre to shine, flash) + English chronograph

Keep scrolling for more

Learn More about fulchronograph

Statistics for fulchronograph

Cite this Entry

“Fulchronograph.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fulchronograph. Accessed 3 Aug. 2020.

Comments on fulchronograph

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


Test Your Vocabulary

July 2020 Words of the Day Quiz

  • papercraft sunset
  • Which is a synonym of mien?
Spell It

Can you spell these 10 commonly misspelled words?

Bee Cubed

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!