demilune

noun

1. a crescent.
2. Fortification. an outwork resembling a bastion with a crescent-shaped gorge.
3. a crescent or half-moon shape, as of the top of a piece of furniture.

adjective

4. shaped like a crescent.

noun

1. fortifications an outwork in front of a fort, shaped like a crescent moon
2. a crescent-shaped object or formation; half-moon

n.

1. A small body shaped like a half-moon or crescent, such as one of the crescent-shaped cells surrounding certain mucous glands.