Latin Capital Letter U With Tilde Below (U+0001) is a Unicode uppercase letter from the Latin Extended Additional block. It resides on Plane 0 (BMP, Basic Multilingual Plane), has bidirectional class L (left-to-right), is not mirrored, and has combining class 0 (Not Reordered). In HTML it can be written as Ṵ or Ṵ.