(exercise) That does not place harmful stresses on the body. / (ecology) That seeks to minimize possible environmental impact.

(exercise) That places a great deal of harmful stresses on the body. / (of plastic, rubber, and similar materials) Capable of withstanding great physical impact.

plural of earwax impaction

(medicine, otolaryngology) Excessive earwax which impedes the passage of sound in the ear canal, causing various symptoms.

A test of the impact strength of a material, used to determine its relative ductility or brittleness. The test is executed by swinging a large, heavy hammer on a pendulum from a predetermined height. The hammer fractures the material sample, usually a block of a certain size with a notch cut in it. The height to which the pendulum swings is used to calculate the energy necessary to fracture the sample.

A rapid and severe brain swelling caused by a second concussion before a first has sufficiently healed, such as may occur after suffering two concussions during the same sports match. It has catastrophic results and may cause death or permanent disability.

plural of second impact syndrome

plural of Charpy impact test

A written or oral statement by the victim of a crime, made as part of the judicial process to convey the impact that the crime has had upon the victim.

plural of victim impact statement