keha (või teimiku) deformeerumist iseloomustav dimensioonitu suurus - mõõtmete suhteline muutus algmõõtmega võrreldes (vt normaalmoone, nihkemoone, mahumoone), the unit change in the size or shape of a body due to force; the term is also used in a broader sense to denote a dimensionless number that characterizes the change in dimensions of an object during deformation or flow process (see: normal strain, shear strain, volume strain)