orbital index

noun

Medical Definition of orbital index

: the ratio of the greatest height of the orbital cavity to its greatest width multiplied by 100 where the width is measured from the dacryon to the farthest point on the opposite border and the height is measured along a line perpendicular to the width — see hypsiconch, mesoconch

Learn More about orbital index

Cite this Entry

“Orbital index.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/orbital%20index. Accessed 12 Aug. 2020.

Comments on orbital index

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

WORD OF THE DAY

Test Your Vocabulary

Original Meanings Quiz

  • rembrandt painting a young scholar and his tutor
  • Which of the following is the earliest known sense of the word awe?
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!