Combining Greek Musical Triseme (U+1D242) is a Unicode nonspacing mark from the Ancient Greek Musical Notation block. It resides on Plane 1 (SMP, Supplementary Multilingual Plane), has bidirectional class NSM (nonspacing mark), is not mirrored, and has combining class 230 (Above). In HTML it can be written as 𝉂 or 𝉂. Because it is outside the Basic Multilingual Plane, proper font support is required; otherwise a fallback box may be shown.