Crater /(krā"tẽr)/

Cra·ter

Crater

n.
  1. The basinlike opening or mouth of a volcano, through which the chief eruption comes; similarly, the mouth of a geyser, about which a cone of silica is often built up.
  2. The pit left by the explosion of a bomb, shell, or mine. (Mil.)
  3. A constellation of the southen hemisphere; -- called also the Cup. (Astron.)