PAXWAX
Etymology
Noun
paxwax (plural not attested)
(anatomy) A strong ligament of the back of the neck in quadrupeds, connecting the back of the skull with dorsal spines of the cervical vertebrae; the nuchal ligament.
Source: Wiktionary
Pax"wax`, n. Etym: [For faxvax, fr. AS. fea hair (akin to OHG. fahs)
+ weaxan to grow. See Wax to grow, and cf. Faxed, Pectinate.] (Anat.)
Definition: The strong ligament of the back of the neck in quadrupeds. It
connects the back of the skull with dorsal spines of the cervical
vertebræ, and helps to support the head. Called also paxywaxy and
packwax.
Source: Webster’s Unabridged Dictionary 1913 Edition