iris diaphragm

noun

Definition of iris diaphragm 

: an adjustable diaphragm of thin opaque plates that can be turned by a ring so as to change the diameter of a central opening usually to regulate the aperture of a lens

First Known Use of iris diaphragm

1867, in the meaning defined above

Keep scrolling for more

Learn More about iris diaphragm

Share iris diaphragm

Dictionary Entries near iris diaphragm

irisated

irisation

iris borer

iris diaphragm

iris family

iris green

Irish

Statistics for iris diaphragm

Look-up Popularity

Time Traveler for iris diaphragm

The first known use of iris diaphragm was in 1867

See more words from the same year

Keep scrolling for more

More Definitions for iris diaphragm

iris diaphragm

noun

Medical Definition of iris diaphragm 

: an adjustable diaphragm of thin opaque plates that can be turned by a ring so as to change the diameter of a central opening usually to regulate the aperture of a lens (as in a microscope)

Comments on iris diaphragm

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

WORD OF THE DAY

to move with a clumsy heavy tread

Get Word of the Day daily email!

Test Your Vocabulary

Late Autumn 2018 Words of the Day Quiz

  • frosted-autumn-leaves
  • Which is a synonym of yahoo?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Citation

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!