stag beetle

Short definition from Wiktionary

Noun

1. 1
   Any of numerous large beetles of the family Lucanidae, the males having elaborate mandibles resembling the antlers of a stag
2. 2
   Any of numerous large beetles of the family Lucanidae, the males having elaborate mandibles resembling the antlers of a stag: especially, the largest beetle in the UK, of species Lucanus cervus.
3. 3
   Alternative form of stag beetle.