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loggerhead:see sea turtlesea turtle,
name for several species of large marine turtles found in tropical and subtropical oceans. These turtles are modified for life in the ocean by having flipperlike forelimbs without toes and lightweight shells. Their heads are too large to be withdrawn into the shell.
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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