Demilune

Demilune, demi-lune, or similar, may refer to:


 * Semicircle shape
 * A half-moon, the first quarter or last quarter lunar phase
 * Semicircular bund, a rainwater harvesting technique in arid areas
 * Ravelin, a type of fortification also called demi-lune
 * Serous demilune (Demilunes of Heidenhain), the crescent shaped formations on salivary glands
 * La Demi Lune, a card game also known as Crescent (solitaire)
 * Demilune (Op.74), a composition by Alan Hovhaness; see List of compositions by Alan Hovhaness
 * La Demi-Lune, Lannemezan, Hautes-Pyrénées, Occitanie, France; a neighbourhood
 * Demi-Lune, La Demi-Lune, Lannemezan, Hautes-Pyrénées, Occitanie, France; a park