The Collaborative International Dictionary of English v.0.48:

Styloid \Sty"loid\, a. [Style + -oid: cf. F. stylo["i]de, Gr.
   ?.]
   1. Styliform; as, the styloid process.
      [1913 Webster]

   2. (Anat.) Of or pertaining to the styloid process.
      [1913 Webster]

   Styloid process (Anat.), a long and slender process from
      the lower side of the temporal bone of man, corresponding
      to the tympanohyal and stylohyal of other animals.
      [1913 Webster]

WordNet (r) 3.0 (2006):

styloid process
    n 1: extends from the base of the temporal bone