plural ulnae
ˈəl-nē 
or ulnas
or ulnas
: the bone on the little-finger side of the human forearm
also
: a corresponding part of the forelimb of vertebrates above fishes
Examples of ulna in a Sentence
Recent Examples on the Web
The findings contained fossils of vertebrae, ribs, humerus, ulna, fibula and foot bones.
—
Julia Jacobo, ABC News, 2 Sep. 2025
In 2014, researchers discovered a 150-million-year-old ulna of a mamenchisaurid in northeastern Thailand with unusual characteristics.
—Lauren Liebhaber, Miami Herald, 30 Apr. 2025
The radius and ulna in the forearm run parallel, connecting your elbow to your wrist.
—Maggie Aime, Msn, Health, 6 Dec. 2024
Her injuries were consistent with those found in modern humans who reach their hands out toward the ground to break a fall: greenstick fractures across both forelimb bones, the radius and the ulna.
—Carly Miller, Forbes, 11 Oct. 2024
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Julia Jacobo, ABC News, 2 Sep. 2025
In 2014, researchers discovered a 150-million-year-old ulna of a mamenchisaurid in northeastern Thailand with unusual characteristics.
—Lauren Liebhaber, Miami Herald, 30 Apr. 2025
The radius and ulna in the forearm run parallel, connecting your elbow to your wrist.
—Maggie Aime, Msn, Health, 6 Dec. 2024
Her injuries were consistent with those found in modern humans who reach their hands out toward the ground to break a fall: greenstick fractures across both forelimb bones, the radius and the ulna.
—Carly Miller, Forbes, 11 Oct. 2024
See All Example Sentences for ulna
Cite this Entry
“Ulna.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ulna. Accessed 4 Nov. 2025.
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