from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Of or designating any of certain small modular bones or cartilages that develop in a tendon or in the capsule of a joint.
  • n. A sesamoid bone or cartilage.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Resembling a sesame seed in size or shape.
  • adj. Of or relating to a sesamoid bone.
  • n. A sesamoid bone or sesamoid cartilage.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Resembling in shape the seeds of sesame.
  • adj. Of or pertaining to the sesamoid bones or cartilages; sesamoidal.
  • n. A sesamoid bone or cartilage.

from The Century Dictionary and Cyclopedia

  • Having the shape of a grain of sesame: especially applied in anatomy to small independent osseous or cartilaginous bodies occurring in tendinous structures.
  • n. In anatomy, a bone developed in the tendon of a muscle at or near a joint; a scleroskel-etal ossification, usually of a nodular shape.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. any of several small round bones formed in a tendon where it passes over a joint


Greek sēsamoeidēs, shaped like a sesame seed : sēsamon, sēsamē, sesame; see sesame + -oeidēs, -oid.
(American Heritage® Dictionary of the English Language, Fourth Edition)


  • Open Cup semifinal Wednesday, and at some point, apparently fractured the sesamoid bone in his right foot -- the same ailment that required surgery in preseason and prevented him from playing in a league match until July 31.

    D.C. United's Marc Burch sidelined again

  • Even after Ruffian broke the sesamoid bones in her foot 3/8s of a mile into the race, she ran as hard as she could for another fifty yards, breaking the hearts of everyone who saw the race.

    Jane Smiley: Match Race

  • Uhlaender, who was introduced to skeleton by friend and bobsledder Sara Sprung, finished sixth overall in her rookie World Cup season last year, competing on two broken bones in her foot — a partially fractured talus in her left ankle that wasn't diagnosed for nearly two years and a broken sesamoid near her left toe. - Uhlaender 'riding the wave' in skeleton

  • Barbaro's cannon bone, sesamoid, and long pastern bone were fractured and he dislocated his ankle joint. - Surgery complete, Barbaro and his sport wait

  • If you watch the replays you'll see that when she switched leads to her right front and landed awkwardly under fatigue, she fractured her cannon bone and additionally she fractured her sesamoid.

    CNN Transcript May 4, 2008

  • You can see the X-rays on the Web, of bones crisscrossed by dark fracture lines like weathered boulders, and even if you can't name the parts — pastern, cannon, sesamoid — it's obvious that something ghastly happened.

    Can Barbaro Beat the Odds?

  • Did these changes in dentition precede the development of the modified radial sesamoid bone or were the changes in dentition secondary.

    Welcome Back - The Panda's Thumb

  • John even knew the name of their nose bone, the nasal sesamoid, and he told me some of the many diseases pigs are heir to, scabies and lice and ticks and liver flukes, worms of the kidneys and worms of the lungs, tapeworms, rabies…

    Our American King

  • Since Thor and Zeus are no longer God (Zeus and other Greek gods were prone to metamorphic transformations), we have to find substitutes for the limited capabilities of the ancient gods (ignoring for the moment how complex it would be to redesign the sesamoid into a “thumb”), we need to invoke a new polytheism working under God which is limited, unlike God, and constrained in absurdly arbitrary ways.

    Finally, someone proposes an ID model - The Panda's Thumb

  • While the red panda is considered a procyonid, the mainstream view now is that the giant panda is indeed a bear, although it diverged from the main ursid line long enough ago to exhibit some striking differences in addition to the enlarged radial sesamoid, such as chromosome number, skull anatomy, and other traits.

    The Panda's Thumb has Evolved ... Twice! - The Panda's Thumb


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  • Related to tahinite.

    March 2, 2015

  • "Having the shape of a grain of sesame: especially applied in anatomy to small independent osseous or cartilaginous bodies occurring in tendinous structures."
    -- from The Century Dictionary and Cyclopedia

    February 26, 2015