The term 'stalactite shape' can be described as an icicle, which is a six-letter word. An icicle is a type of frozen precipitation that hangs from the roof or side of a cave, formed by dripping water. It is usually conically shaped and pointed at the bottom. Stalactites are formed when water containing dissolved minerals drips from the ceiling of a cave and deposits the minerals in layers. Over time, these layers build up and form a stalactite.