Source : Webster's Revised Unabridged Dictionary (1913)

Striatum \Stri*a"tum\, n. [NL.] (Anat.)
   The corpus striatum.

Source : WordNet®

striatum
     n : a striped mass of white and grey matter located in front of
         the thalamus in each cerebral hemisphere; consists of the
         caudate nucleus and the lenticular nucleus [syn: {corpus
         striatum}, {striate body}]