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 (D. Hercules) of tropical America, which grow to be six inches in length.
© Webster 1913.