Lunette | Definition of Lunette by Merriam-Webster
lunette: [noun] something that has the shape of a crescent or half-moon: such as. an opening in a vault especially for a window. the surface at the upper part of a wall that is partly surrounded by a vault which the wall intersects and that is often filled by windows or by mural painting. a low crescentic mound (as of sand) formed by the wind.
