Definition of Hercules beetle in US English:

Hercules beetle

noun

  • A large tropical American rhinoceros beetle, the male of which has two long curved horns extending from the head and one from the thorax.

    Genus Dynastes, family Scarabaeidae: several species, including the eastern Hercules beetle (D. tityus) of the southeastern US

    • ‘In size they range from 0.25 to 0.3 mm to over 150 cm for the giant Goliath and Hercules beetles, which in size are the largest living species of insects.’
    • ‘The Coleoptera also includes some of the largest insects, like the living Hercules beetle, Dynastes hercules.’
    • ‘The largest beetle in the Americas is the Hercules beetle, which can be 4 to 6 inches in length.’