cardioid

noun
car·​di·​oid | \ ˈkär-dē-ˌȯid How to pronounce cardioid (audio) \

Definition of cardioid

: a heart-shaped curve that is traced by a point on the circumference of a circle rolling completely around an equal fixed circle and has an equation in one of the forms ρ = a(1 ± cos θ) or ρ = a(1 ± sin θ) in polar coordinates

Illustration of cardioid

Illustration of cardioid

cardioid: ABP fixed circle; PCD first position of rolling circle; P tracing point; PM diameter through P; P1, P2, P3, P4 various positions of P; P1M1, P2M2, P3M3, P4M4 various positions of PM

Examples of cardioid in a Sentence

Recent Examples on the Web The cells stay behind on the cardioid, which then starts to recover. Theresa Machemer, Smithsonian Magazine, 20 May 2021 The Yeti can record in four different modes: cardioid, omni, bidirectional, and stereo. Popular Science, 21 Jan. 2020 The Yeti Nano has two recording patterns: cardioid (for capturing a source talking directly into the mic) and omnidirectional (for capturing audio in a small area around the mic). Jeff Dunn, Ars Technica, 19 Nov. 2018 This compact cardioid condenser mic jacks into the phone via a Lightning dongle to bring your sparkling dialog into focus. Arielle Pardes, WIRED, 1 July 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'cardioid.' 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 cardioid

1753, in the meaning defined above

Keep scrolling for more

Learn More About cardioid

Time Traveler for cardioid

Time Traveler

The first known use of cardioid was in 1753

See more words from the same year

Dictionary Entries Near cardioid

cardiograph

cardioid

cardioid condenser

See More Nearby Entries 

Statistics for cardioid

Cite this Entry

“Cardioid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cardioid. Accessed 22 Oct. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon
Seen & Heard
People are talking about

WORD OF THE DAY

Test Your Vocabulary

Dog Words Quiz

  • shiba puppy more or less demanding cuddles
  • Which of the following animals has a dog in its etymology?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

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!