ses·​a·​moid | \ ˈse-sə-ˌmȯid How to pronounce sesamoid (audio) \

Definition of sesamoid

: a nodular mass of bone (such as the patella) or cartilage in a tendon especially at a joint or bony prominence

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Other Words from sesamoid

sesamoid adjective

Examples of sesamoid in a Sentence

Recent Examples on the Web

The question is whether the toe injury – a likely sesamoid fracture – will heal or require surgery. Profootballdoc,, "Top offseason medical issues for every NFC team," 27 Feb. 2018 Mengden suffered a fracture of his medial tibial sesamoid bone during a bullpen throwing session. John Hickey, The Mercury News, "Daniel Mengden’s foot surgery a hit for A’s rotation depth," 8 Feb. 2017 Trainer John Shirreffs said X-rays showed a fractured sesamoid bone in the colt’s right front ankle. Beth Harris, The Seattle Times, "New horses among Preakness challenges facing Always Dreaming," 14 May 2017 Trainer John Shirreffs said X-rays showed a fractured sesamoid bone in the colt's right front ankle. Beth Harris,, "New Horses Among Preakness Challenges Facing Always Dreaming," 14 May 2017 Forsythe has had surgeries to remove a sesamoid in both feet and suffered from plantar fasciitis in his right foot. J.p. Hoornstra, Orange County Register, "Nolan Arenado’s two home runs send Dodgers to third straight loss," 18 Apr. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'sesamoid.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of sesamoid

circa 1696, in the meaning defined above

History and Etymology for sesamoid

Greek sēsamoeidēs, literally, resembling sesame seed, from sēsamon

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Dictionary Entries near sesamoid

sesame oil







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Time Traveler for sesamoid

The first known use of sesamoid was circa 1696

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More Definitions for sesamoid


ses·​a·​moid | \ ˈses-ə-ˌmȯid How to pronounce sesamoid (audio) \

Medical Definition of sesamoid

 (Entry 1 of 2)

: 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



Medical Definition of sesamoid (Entry 2 of 2)

: a sesamoid bone or cartilage

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