Strong's G2777 — κεφαλίς (noun)
kephalis (kef-al-is') n.
1. (properly) a knob
2. (by implication) a roll (by extension from the end of a stick on which the manuscript was rolled)
[from G2776]
KJV: volume 
Root(s): G2776 
Hebrew root: κεφαλή
Occurrences: 1