Search Result for "third ventricle":
Wordnet 3.0

NOUN (1)

1. a narrow ventricle in the midplane below the corpus callosum; communicates with the fourth ventricle via the Sylvian aqueduct; 



WordNet (r) 3.0 (2006):

third ventricle
    n 1: a narrow ventricle in the midplane below the corpus
         callosum; communicates with the fourth ventricle via the
         Sylvian aqueduct