Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

Medical Dictionary

intercostal muscle

noun

Medical Definition of intercostal muscle

  1. :  any of the short muscles that extend between the ribs filling in most of the intervals between them and serving to move the ribs in respiration:a:  any of 11 muscles on each side between the vertebrae and the junction of the ribs and their cartilages of which each arises from the caudal margin of one rib and is inserted into the cranial margin of the rib below—called also external intercostal muscleb:  any of 11 muscles on each side between the sternum and the line on a rib marking an insertion of the iliocostalis of which each arises from the inner surface of a rib and its corresponding costal cartilage and is inserted into the cranial margin of the rib below—called also internal intercostal muscle




Seen and Heard

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

WORD OF THE DAY

February 5, 2016

bread traditionally eaten on Shabbat

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image1037863653

Which of the following refers to thin, bending ice, or to the act of running over such ice?

kittly-benders duvet spindrift pince-nez
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

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

TAKE THE QUIZ