cardiac muscle


Definition of cardiac muscle

: the principal involuntary-muscle tissue of the vertebrate heart made up of striated fibers joined at usually branched ends and functioning in synchronized rhythmic contraction

Examples of cardiac muscle in a Sentence

Recent Examples on the Web

The transplant surgeons had clipped some pieces of Astrea’s cardiac muscle. New York Times, "Every Cell in Your Body Has the Same DNA. Except It Doesn’t.," 21 May 2018 In the heart, this causes cardiac muscle cells to contract with more force than necessary, for instance. Beth Mole, Ars Technica, "Poison arrows inspire new male contraceptive, scientists report," 21 Jan. 2018 Weird, deadly electrical rhythms arose out of his dying cardiac muscles, like ripples on a stagnating pond, necessitating defibrillating shocks to reset his rhythm. Siddhartha Mukherjee, New York Times, "The Rules of the Doctor’s Heart," 24 Oct. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'cardiac muscle.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of cardiac muscle

circa 1881, in the meaning defined above

Keep scrolling for more

Learn More about cardiac muscle

Statistics for cardiac muscle

Look-up Popularity

Time Traveler for cardiac muscle

The first known use of cardiac muscle was circa 1881

See more words from the same year

Keep scrolling for more

More Definitions for cardiac muscle

cardiac muscle


Medical Definition of cardiac muscle

: the principal muscle tissue of the vertebrate heart that is made up of elongated striated muscle fibers each of which consists of a single cell that has an intrinsic rhythm of contraction and relaxation even when isolated, is joined physically at its often branched ends to other such cells by intercalated disks, and in intact myocardial tissue is synchronized to function in contraction especially by electrical signals of extrinsic origin passing through gap junctions in the intercalated disks — compare smooth muscle, striated muscle

More from Merriam-Webster on cardiac muscle Encyclopedia article about cardiac muscle

Comments on cardiac muscle

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


something desired as essential

Get Word of the Day daily email!

Test Your Vocabulary

What's that Smell?! Quiz

  • wide eyed dog smelling rose
  • Someone who is hircine smells like a:
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

Bee Cubed

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!