icebreaker

n. boat used to make a passage through ice; tool used to crush ice; opening remark or joke designed to put people at ease

An icebreaker is a special purpose ship or boat designed to move and navigate through ice-covered waters. Although this article mainly discusses icebreaking ships, the term can refer to smaller vessels (e.g., icebreaking boats that were used on the Canals of Great Britain in the days of commercial carrying).
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JezzBall is a computer game in which red-and-white balls, referred to as atoms, bounce about a rectangular field of play, or room. The player advances to the next level (with correspondingly higher numbers of atoms and lives) by containing the atoms in progressively smaller spaces, until at least 75% of the area is blocked off. One gains a bonus for eliminating more than 75%, which is calculated from the percentage over 75% that one manages to block off. One must do this while racing against the clock. It is similar to Qix, which was released during the Golden Age of Arcade Games.
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Noun
1. a ship with a reinforced bow to break up ice and keep channels open for navigation
(synonym) iceboat
(hypernym) ship
2. a beginning that relaxes a tense or formal atmosphere; "he told jokes as an icebreaker"
(hypernym) beginning, start, commencement

<security, jargon> A program designed for cracking security on a system.
See also: ICE.
[Jargon File]
(2000-03-18)

ROMPIGHIACCIO. NAVE ROMPIGHIACCIO