Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

parfocal

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

Definition of parfocal

  1. :  being or having lenses or lens sets (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 of parfocal

Latin par equal + English focal


First Known Use: circa 1886


Medical Dictionary

parfocal

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

Medical Definition of parfocal

  1. :  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 \-fō-ˈkal-ət-ē\play noun plural parfocalities



Learn More about parfocal

  1. Medical Dictionary: Definition of "parfocal"


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).

WORD OF THE DAY

to dishevel or rumple

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

alt-5746713d76276

Which of these is a synonym of nonplus?

soothe reduce perplex disapprove
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

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

TAKE THE QUIZ