Paxwax
Paxwax , noun
[For faxvax, from Anglo-Saxon feax hair (akin to Old High German fahs) + weaxan to grow. See Wax to grow, and compare Faxed, Pectinate.]
(Anatomy) The strong ligament of the back of the neck in quadrupeds. It connects the back of the skull with dorsal spines of the cervical vertebra, and helps to support the head. Called also paxywaxy and packwax.