'Dynastidan' definitions:

Definition of 'Dynastidan'

From: GCIDE

Dynastidan \Dy*nas"ti*dan\, n. [Gr. ?, fem. of ?. See Dynast. The name alludes to the immense size of some species.] (Zool.) One of a group of gigantic, horned beetles, including Dynastus Neptunus, and the Hercules beetle ({Dynastus Hercules}) of tropical America, which grow to be six inches in length. [1913 Webster]