a. [According to Syd. Soc. Lex. from Giulio Casserio of Piacenza, 1545–1616.] Casserian (or Gasserian) ganglion: the ganglion of the larger root of the fifth nerve.
1842. E. Wilson, Anat. Vade Mec., 407. It arises from the upper angle of the Casserian ganglion.
