“Ice that forms in the shape of a narrow cone hanging point down. It usually forms when liquid water from a sheltered or heated source comes in contact with below-freezing air and freezes more or less rapidly as it flows.” From meteorology geography dictionary
If you zoom in a little you get to see more detail
Zoom a little bit more …..
Stand still for a moment or two and watch the icicle form; drip, drip, drip.
Photos taken in the French Alps 17/02/13