(card games) A solitaire card game based on the Tower of Hanoi puzzle, starting with 3 columns of 3 cards, from A to 9. The object of the game is to build only one column with all the nine cards.

The clock tower at the north end of the Palace of Westminster, London.

A mathematical puzzle or game which consists of three rods, and a number of disks of different sizes that can slide onto any rod.

(computing) A relatively small tower case for a computer system.

A London borough in the East End, Greater London.

Turritis glabra (syn. Arabis glabra), a tall, slim, grey-green plant with small creamy flowers at the top of the stem.

(fortifications) A bastion of masonry, often with chambers beneath it, built at an angle of the interior polygon of some works.

A large tower or chamber used in the manufacture of sulfuric acid, to condense the crude acid and to deliver concentrated acid charged with nitrous fumes. These fumes, as a catalyst, effect the conversion of sulfurous to sulfuric acid.

(video games) A style of real-time strategy video game in which the player attempts to stop enemies from crossing a map by building traps to slow them down and towers or turrets which shoot at them as they pass within range.

A tall building in which droplets of molten lead fall into a pool of water in order to form lead shot