Demilune /(?)/

Dem·i·lune

Demilune

n.
  1. A work constructed beyond the main ditch of a fortress, and in front of the curtain between two bastions, intended to defend the curtain; a ravelin. See Ravelin. (Fort.)
  2. A crescentic mass of granular protoplasm present in the salivary glands. (Physiol.)