Wall spring

a spring of water issuing from stratified rocks.

See also: Wall

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
THE North East has some stunning sights (Durham Cathedral, The Angel of the North, Hadrian's Wall spring to mind) - but for stunning and unexpected, the Bowes Museum must take the biscuit.
The Hertz stiffness ([k.sub.h]), moat wall spring stiffness ([k.sub.w]), and isolation layer spring stiffness ([k.sub.b]) are considered here.
There are loads of new techniques to master, such as boosting off wall springs and swinging on chains.