dioptrate

adjective
di·op·trate | \ dīˈäpˌtrāt , -trə̇t \

Definition of dioptrate 

: divided by a transverse line or septum used of the compound eyes of certain insects (such as water beetles) and of ocelli on the wings of certain moths and butterflies

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 dioptrate

dia- + optr- (irregular from Greek opsesthai to be going to see) + -ate

Keep scrolling for more

Learn More about dioptrate

Dictionary Entries near dioptrate

dioptase

diopter

dioptral

dioptrate

dioptric

dioptry

Dior

Statistics for dioptrate

Look-up Popularity

Comments on dioptrate

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

WORD OF THE DAY

occurring twice a year or every two years

Get Word of the Day daily email!

Test Your Vocabulary

Name that Food Quiz

True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Word Winder's CrossWinder

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

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!