- a beetle of a large group that includes the scarabaeids, dor beetles, and stag beetles. Scarabaeoids include the largest known beetles, and are distinguished by having plate-like terminal segments in the antennae. Formerly called lamellicorn.
- Superfamily Scarabaeoidea (formerly Lamellicornia)
late 19th century: from modern Latin Scarabaeoidea (plural), from Latin scarabaeus (see scarab)