from The Century Dictionary.
- noun In milit. engin., a line passing diagonally from one pontoon of a bridge to another.
Sorry, no etymologies found.
We all walk with our genitals on our sleeves or our mental genitals on our Armani spring-line three-piece-suits or cut-off flannel button-ups.
Sometimes it will surface through a spring-line, i.e. above ground level where it is forced out of the hill side because an impermeable layer prevents further downward flow.
If luck is on your side, a spring-line may exist above the level of the camp site.
This side-partner of yours didn't get his pay before he went ashore with the spring-line;
Though haste in making fast is the spring-line man's first duty, Griswold took a fraction of a second to look around him.
Come — out with your spring-line — what’re you about there!