from The Century Dictionary and Cyclopedia
- n. A vertical line drawn on the surface of the chest through the nipple.
Sorry, no etymologies found.
In this connection he proposes the following operative procedure: Two longitudinal incisions to be made from the lower border of the 3d rib to the upper border of the 7th rib, one running along the inner margin of the sternum, the other about ten mm. inside the nipple-line.