Source : Webster's Revised Unabridged Dictionary (1913)

Sesamoid \Ses"a*moid\, a. [Gr. ???? like sesame; ????? sesame +
   ??? form: cf. F. s['e]samo["i]de.]
   1. Resembling in shape the seeds of sesame.

   2. (Anat.) Of or pertaining to the sesamoid bones or
      cartilages; sesamoidal.

   {Sesamoid bones}, {Sesamoid cartilages} (Anat.), small bones
      or cartilages formed in tendons, like the patella and
      pisiform in man.