Ahom Vowel Sign O (U+2DD0) is a Unicode nonspacing mark from the Ahom block. It resides on Plane 0 (BMP, Basic Multilingual Plane), has bidirectional class NSM (nonspacing mark), is not mirrored, and has combining class 0 (Not Reordered). In HTML it can be written as 𑜨 or 𑜨.