petrotympanic fissure

noun

Medical Definition of petrotympanic fissure 

: a narrow transverse slit dividing the glenoid fossa of the temporal bone

called also Glaserian fissure

Learn More about petrotympanic fissure

Share petrotympanic fissure

Comments on petrotympanic fissure

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

WORD OF THE DAY

not any or not one

Get Word of the Day daily email!

Test Your Vocabulary

Great Scrabble Words—A Quiz

  • scrabble-tiles-that-read-scrabble-quiz
  • Which of the following Q-without-U words means the number five in cards or dice?
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

Love words? Need even more definitions?

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