Bulldozer:

Bulldozer, powerful machine for pushing earth or rocks , used in road building, farming, construction, and wrecking; it consists of a heavy, broad steel blade or plate mounted on the front of a tractor. A bulldozer or dozer (also called a crawler) is a large tractor equipped with a metal blade at the front for pushing material (soil, sand, snow, rubble, or rock) during construction work. Cat® dozers are made to handle your jobsite needs: from large to small sizes, mining applications to finish work, you are certain to find a Cat bulldozer for any kind of work. A bulldozer is a heavy-duty machine equipped with a large metal blade at the front, designed to push, lift, and level large amounts of soil, sand, rubble, or other materials.