Word Study
silenus
CIDE DICTIONARY
silenus, n. [L. Silenus the tutor and attendant of Bacchus.].
See Wanderoo. [1913 Webster]
OXFORD DICTIONARY
silenus, n. (pl. sileni) (in Greek mythology) a bearded old man like a satyr, sometimes with the tail and legs of a horse.
Etymology
L f. Gk seilenos
For further exploring for "silenus" in Webster Dictionary Online