principal axis

noun
prin·​ci·​pal axis | \ ˈprin(t)-sə-pəl- How to pronounce principal axis (audio) \

Medical Definition of principal axis

: the line with respect to which a spherical mirror or lens system is symmetrical and which passes through both the center of the surfaces and their centers of curvature

Comments on principal axis

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

WORD OF THE DAY

not to be persuaded, moved, or stopped

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Latin Quiz

  • roman forum
  • Which of the following months comes from a Latin word for “ten”?
True or False

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

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!