parfocal

play
adjective par·fo·cal \ ˌpär-ˈfō-kəl \

Definition of parfocal

:being or having lenses or lens sets (such as eyepieces) with the corresponding focal points all in the same plane

parfocality

play \ˌpär-fō-ˈka-lə-tē\ noun

parfocalize

play \ˌpär-ˈfō-kə-ˌlīz\ transitive verb

Origin and Etymology of parfocal

Latin par equal + English focal


Medical Dictionary

parfocal

play
adjective par·fo·cal \ (ˈ)pär-ˈfō-kəl \

medical Definition of parfocal

:having corresponding focal points all in the same plane :having sets of objectives or eyepieces so mounted that they may be interchanged without varying the focus of the instrument (as a microscope) with which they are used

parfocality

play \-fō-ˈkal-ət-ē\ noun plural -ties

Seen and Heard

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

Love words? Need even more definitions?

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

WORD OF THE DAY

a strongly worded attack

Get Word of the Day daily email!

Test Your Vocabulary

Merriam-Webster's New Words Quiz—Fall 2017 Edition!

  • young-plant-shoots
  • Which of the following is a new sense of the word bunny?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
SCRABBLE® Sprint

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!