ostium secundum

noun
ostium se·​cun·​dum | \ -sə-ˈkən-dəm How to pronounce ostium secundum (audio) \

Medical Definition of ostium secundum

: an opening in the upper part of the developing embryonic interatrial septum corresponding to the foramen ovale of the fetus

Comments on ostium secundum

What made you want to look up ostium secundum? 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!