Glossary

Abrasion-Wearing away by friction.
Abrasive-Sharp granular material used to reduce or prevent slippery road surfaces.
Abscissa-The distance measure in the 'Y' or horizontal direction on a graph.
Absorption-The process by which a liquid is drawn into and tends to fill permeable pores in a porous solid body.
Accuracy-The degree of agreement between a measured value and a true value.