Small, temporary scaffolding, often equipped with wheels, for small-scale building work

(historical) A siege weapon, consisting of a wheeled wooden tower with ladders inside, which was parked next to walls so assailants could safely scale them.

electricity pylon

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.

(mining) headframe.

plural of winding tower

plural of control tower