wellhead

The source, head, or origin of a river, ., a spring of water. "Up to the saddle-girths in a well-head, as the springs are called."- Scott : Old Mortality , ch. xv. well-hole, s. 1. Ord. Lang.: A cavity which receives a counterbalancing weight in some mechanical contrivances. 2. Arch .: The same as WELL, 8. , II. 1. *well-kerse, s. [WELL-GRASS.]