an equatorial constellation split into two separate regions, (head) and (tail), on opposite sides of Ophiuchus
See Serpens in American Heritage Dictionary 4
(sûrˈpənz, -pĕnzˌ)
noun
A constellation in the equatorial region of the northern sky, made up of two parts, Serpens Cauda, the “tail,” and Serpens Caput, the “head,” both near Hercules and Ophiuchus.