intercostal artery


Medical Definition of intercostal artery

: any of the arteries supplying or lying in the intercostal spaces:
a : any of the arteries branching in front directly from the internal mammary artery to supply the first five or six intercostal spaces or from its branch comprising the musculophrenic artery to supply the lower intercostal spaces

called also anterior intercostal artery

b : any of the arteries that branch from the costocervical trunk of the subclavian artery to supply the first or first two intercostal spaces or of the nine or 10 arteries that branch from the aorta to supply the lower intercostal spaces

called also posterior intercostal artery

Learn More about intercostal artery

Cite this Entry

“Intercostal artery.” Medical Dictionary, Merriam-Webster, Accessed 18 Sep. 2020.

Comments on intercostal artery

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


Test Your Vocabulary

Homophone Quiz

  • three bears two of them look like theyre whispering to a third bear who looks chuffed to be the center of attention
  • In order to judge how people felt, the senator's office hired a firm to take a ______.
Spell It

Can you spell these 10 commonly misspelled words?

Dictionary Devil

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

Love words? Need even more definitions?

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