ventricle

plural ventricles

1. Any small cavity within a body; a hollow part or organ, especially:
   1. anatomyOne of two lower chambers of the heart.

      The muscular ventricles pump blood by contracting their fibers in response to electrical stimulation.

      2018, Sandeep Jauhar, Heart: a History, →ISBN, page 47

      1 more example

      “It gave me the wrong one. I thought, wow, if a heart surgeon was using AI to find the lower ventricle… what sort of world would we be living in?”

      2026 June 21, Annabel Nugent, quoting Anthony Horowitz, “The authors who admit to using AI: ‘I have absolutely no shame about it’”, in The Independent

      Synonyms: cardioventricle

   2. anatomyOne of four fluid-filled cavities in the brain, that are continuous with the central canal of the spinal cord.

      the ventricle of memory

      c. 1595–1596 (date written), William Shakespeare, “Loues Labour’s Lost”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, →OCLC, [Act IV, scene ii]

      Synonyms: cerebroventricle

   3. archaicanatomyA ventriculus; especially, a stomach.

      [On birds] Where omitting the more general Properties, of having two Ventricles, and picking up stones to conveigh them into their second Ventricle, the Gizzern, (which provision and instinct is a supply for the want of teeth;) […]

      1662, Henry More, An Antidote Against Atheism, Book II: A Collection of Several Philosophical Writings of Dr. Henry More, page 72

   4. archaicanatomyThe womb.