[log.ger.head] n [prob. fr. E dial. logger block of wood + E head] (1588) 1 chiefly dial a: blockhead b: head; esp: a disproportionately large head
2. a: a very large carnivorous sea turtle (Caretta caretta) of subtropical and temperate waters b: alligator snapper
3: 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 -- at loggerheads : in or into a state of quarrelsome disagreement