Definition of cornu in US English:



  • 1A horn-shaped projection of the thyroid cartilage or of certain bones (such as the hyoid and the coccyx).

    • ‘Further, they state that the inferior cornu of the thyroid cartilage is the best guide to the site of entry of the nerve into the larynx.’
    • ‘The upper horns meet the back of the hyoid bone, while the inferior cornua are attached to the side of the cricoid, forming a pivotal joint.’
  • 2Either of the two lateral cavities of the uterus, into which the fallopian tubes pass.

    • ‘The tumor formed a large fungating mass over the right posterior wall of the uterus, extending from the level of the right cornu to the endocervix, and laterally to the right broad ligament.’
    • ‘The uterus measured 9.0 cm from fundus to cervix, 6.5 cm from cornu to cornu, and 3.0 cm from anterior to posterior.’
  • 3Each of three elongated parts of the lateral ventricles of the brain.


Late 17th century: from Latin, ‘horn’.