Plural of Icicle.An icicle is a piece of ice in a cone shape that forms when the water dripping off an object freezes due to frost. They are usually formed when ice or snow is melted by the heat of the Sun ( or any other source of heat ) and subsequently the water arising comes into contact with an area with temperatures below 0 ° C turning to freeze.Icicles are usually straight and pointy, cone but due to wind or if the water falls very slowly, can be made of rounded and curved forms.If the process of frozen and thawed continuous Icicle increases length and girth gradually. Weight which can reach the icicles can sink the structure of rooftops and break the branches where hung, and can reach nailed like a knife to fall to the ground from the top.