Half-moon /(-mo͡on`)/

Half·-moon

Half-moon

n.
  1. The moon at the quarters, when half its disk appears illuminated.
  2. The shape of a half-moon; a crescent.
    See how in warlike muster they appear, In rhombs, and wedges, and half-moons, and wings.
  3. An outwork composed of two faces, forming a salient angle whose gorge resembles a half-moon; -- now called a ravelin. (Fort.)
  4. A marine, sparoid, food fish of California (Caesiosoma Californiense). The body is ovate, blackish above, blue or gray below. Called also medialuna. (Zool.)