- A cavern in a cliff, at the water level, opening to the
air at its farther extremity, so that the waters rush in with each
surge and rise in a lofty jet from the extremity. - A nostril or spiracle in the top of the head of a whale
or other cetacean. - A hole in the ice to which whales, seals, etc., come to
breathe. - An air hole in a casting.
Definition
[ n.]