The Collaborative International Dictionary of English v.0.48:

Arytenoid \A*ryt"e*noid\, a. [Gr. ? shaped like a ladle; ? a
   ladle + e'i^dos form.] (Anat.)
   Ladle-shaped; -- applied to two small cartilages of the
   larynx, and also to the glands, muscles, etc., connected with
   them. The cartilages are attached to the cricoid cartilage
   and connected with the vocal cords.
   [1913 Webster]

WordNet (r) 3.0 (2006):

arytenoid
    n 1: either of two small cartilages at the back of the larynx to
         which the vocal folds are attached [syn: arytenoid,
         arytaenoid, arytenoid cartilage]