Definify.com
Webster 1913 Edition
Paxwax
Pax′waxˊ
,Noun.
 [For 
faxvax
, fr. AS. feax 
hair (akin to OHG. fahs
) + weaxan 
to grow. See Wax 
to grow, and cf. Faxed
, Pectinate
.] (Anat.) 
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
.