| shear [shir] DESIGN ENGINEERING A cutting tool having two opposing blades between which a material is cut. ENGINEERING An apparatus for hoisting heavy loads consisting of two or more poles fastened together at their upper ends and spread apart at their lower ends, secured or steadied by a guy or guys, and provided with a tackle. Also known as shear legs. MECHANICS See <<shear strain>> MINING ENGINEERING To make vertical cuts in a coal seam that has been undercut. |