demilune /ˈdɛmɪluːn/noun 2adjective 1forms 1 noun2 •A fortification constructed beyond the main ditch of a fortress, and in front of the curtain between two bastions, intended to defend the curtain; a ravelin. •A crescentic mass of granular protoplasm present in the salivary glands. adjective1 •In the shape of a half-moon, i.e. semicircular. formsdemilunes
