U+1D999 "𝦙" Signwriting Movement-Wallplane Wave Curve Double Small Unicode Character

U+1D999 "𝦙" Signwriting Movement-Wallplane Wave Curve Double Small is a symbol in the SignWriting script, which is designed to graphically represent sign languages through visual depictions of hand shapes, movements, and orientations. This specific character denotes a small, double wave curve that moves along the wallplane, a vertical surface in the signing space, indicating a wavy or undulating path of motion with two distinct, small peaks or curves. It is used in SignWriting notation to describe nuanced, repeating movements of the hands or arms within a plane perpendicular to the signer's body, helping to convey the precise kinetics of a sign.