limb in Wingdings is ●︎♓︎❍︎♌︎

A border or edge, in certain special uses.(a) (Bot.) The border or upper spreading part of a monopetalouscorolla, or of a petal, or sepal; blade.(b) (Astron.) The border or edge of the disk of a heavenly body,especially of the sun and moon.(c) The graduated margin of an arc or circle, in an instrument formeasuring angles.