ˈ ̷ ̷ˌ ̷ ̷ noun
Etymology: Middle English welleheved, from welle well + heved head — more at well (spring), head
1. : the place where a spring emerges from the ground : the source from which a stream flows
traveled … among the wellheads of wild rivers — R.L.Stevenson
2. : the principal source : fountainhead
from the wellhead of pure science flow fertilizing streams which serve industry — Benjamin Farrington
3.
a. : the top of a well
Federal price control of natural gas at the wellhead — Gene Smith
b. : a structure built over the top of a well
an authentic Roman wellhead