SINCE 1828
dictionary
thesaurus

idiometer

noun
Save Word
id·​i·​om·​e·​ter | \ ˌidēˈämətə(r) \

Definition of idiometer

: an instrument for ascertaining the personal equation of an astronomical observer

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 idiometer

1881, in the meaning defined above

History and Etymology for idiometer

idio- + -meter

Learn More About idiometer

Time Traveler for idiometer

Time Traveler

The first known use of idiometer was in 1881

See more words from the same year

Dictionary Entries Near idiometer

idiomatic

idiometer

Idiom Neutral

See More Nearby Entries 

Statistics for idiometer

Cite this Entry

“Idiometer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/idiometer. Accessed 28 Jun. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

WORD OF THE DAY

fulsome

Listen to the pronunciation of fulsome

See Definitions and Examples »

Test Your Vocabulary

Name That Food

  • a-light
  • Name these cookies!
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ
Love words? Need even more definitions?

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

Words at Play
Ask the Editors
Word Games