"Ice needle" is a specific term for a type of ice formation that resembles thin spikes or needles. However, there are several other synonyms for this term, including "ice hair," "ice whiskers," "frost needles," and "feather frost." All of these terms describe small, delicate ice formations that grow in cold, humid conditions. They can be found on plants, trees, and other surfaces, creating a beautiful, delicate effect. While the name may vary, the effect remains the same - a shimmering and sparkling accent that transforms the landscape and adds a touch of magic to any winter scene.