LOGGERHEAD

noun Etymology: probably from English dialect logger block of wood + English head Date: 1588 1. chiefly dialect blockhead , head , 2. a very large chiefly carnivorous sea turtle ( Caretta caretta ) of subtropical and temperate waters, alligator snapping turtle , an iron tool consisting of a long handle terminating in a ball or bulb that is heated and used to melt tar or to heat liquids