A form of undersea diving in which the diver enters the water through a hole cut in the ice.

A dense fog that consists of fine particles of ice.

(rivers, glaciers) an obstruction to the flow of a river caused by the flow of a glacier across its course

a small atmospheric particle, around which an ice crystal grows

a network of interconnected glaciers or ice streams having a common source / a large expanse of floating ice (several miles long)

a small crystal of ice floating in the high atmosphere; a constituent of snow mist

The annual thawing of winter ice on a body of water.

the sport of racing cars or other vehicles on frozen lakes or rivers

Alternative spelling of icepick

A temporary structure, similar to a small palace or castle, made from blocks of ice.