sesamoid
noun
ses·a·moid
ˈse-sə-ˌmȯid 
: a nodular mass of bone (such as the patella) or cartilage in a tendon especially at a joint or bony prominence
sesamoid
adjective
Examples of sesamoid in a Sentence
Recent Examples on the Web
During Race 2, Chloe's Dream sustained a right knee fracture at the top of the first turn, and during Race 8, Freezing Point sustained a biaxial sesamoid fracture.
—
Marissa G. Muller, Peoplemag, 15 May 2023
The possibility remains that guard Norman Powell, sidelined since Feb. 10 with a fractured medial sesamoid bone in his foot, could join them on the practice floor.
—Andrew Greif, Los Angeles Times, 3 Apr. 2022
The Clippers released a statement saying that Powell fractured the medial sesamoid bone and there is no timetable for his return.
—Los Angeles Times, 14 Feb. 2022
The 5-year-old mare Moreavino suffered a right front sesamoid fracture on the far turn of the 1-mile fifth race Thursday.
—Bill Center, San Diego Union-Tribune, 5 Aug. 2021
Though there’s one type of sesamoid bone that almost everyone has: the kneecap.
—Alex Schwartz, Popular Science, 5 Feb. 2020
Enter the panda’s pseudo-thumb, which is also composed of an enlarged radial sesamoid and cartilaginous extension, and is controlled by the same three muscles as in the aye-aye.
—National Geographic, 21 Oct. 2019
Further investigation revealed two other muscles are connected to the radial sesamoid, which allow the bone to move in a gripping motion.
—National Geographic, 21 Oct. 2019
The question is whether the toe injury – a likely sesamoid fracture – will heal or require surgery.
—Profootballdoc, sandiegouniontribune.com, 27 Feb. 2018
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Marissa G. Muller, Peoplemag, 15 May 2023
The possibility remains that guard Norman Powell, sidelined since Feb. 10 with a fractured medial sesamoid bone in his foot, could join them on the practice floor.
—Andrew Greif, Los Angeles Times, 3 Apr. 2022
The Clippers released a statement saying that Powell fractured the medial sesamoid bone and there is no timetable for his return.
—Los Angeles Times, 14 Feb. 2022
The 5-year-old mare Moreavino suffered a right front sesamoid fracture on the far turn of the 1-mile fifth race Thursday.
—Bill Center, San Diego Union-Tribune, 5 Aug. 2021
Though there’s one type of sesamoid bone that almost everyone has: the kneecap.
—Alex Schwartz, Popular Science, 5 Feb. 2020
Enter the panda’s pseudo-thumb, which is also composed of an enlarged radial sesamoid and cartilaginous extension, and is controlled by the same three muscles as in the aye-aye.
—National Geographic, 21 Oct. 2019
Further investigation revealed two other muscles are connected to the radial sesamoid, which allow the bone to move in a gripping motion.
—National Geographic, 21 Oct. 2019
The question is whether the toe injury – a likely sesamoid fracture – will heal or require surgery.
—Profootballdoc, sandiegouniontribune.com, 27 Feb. 2018
Cite this Entry
“Sesamoid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sesamoid. Accessed 20 Jun. 2025.
Copy CitationMedical Definition
sesamoid
1 of 2 adjective
ses·a·moid
ˈses-ə-ˌmȯid
: of, relating to, or being a nodular mass of bone or cartilage in a tendon especially at a joint or bony prominence
the patella is the largest sesamoid bone in the human body
sesamoid
2 of 2 noun
: a sesamoid bone or cartilage
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