The symbol "🌓" represents a semicircle. It depicts half of a circle, with a curved line forming the boundary and a filled-in portion on one side. This representation captures the essence of a semicircle, which is a two-dimensional geometric shape that consists of an arc connecting two endpoints and a diameter that divides the circle into two equal halves. The symbol "🌓" visually conveys the concept of a semicircle in a concise and recognizable manner.