loggerhead
1. a large-headed turtle, Caretta caretta, occurring in most seas: family Chelonidae
2. loggerhead shrike a North American shrike, Lanius ludovicianus, having a grey head and body, black-and-white wings and tail, and black facial stripe
3. a tool consisting of a large metal sphere attached to a long handle, used for warming liquids, melting tar, etc.
4. a strong round upright post in a whaleboat for belaying the line of a harpoon
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005