n A session in which a product or piece of equipment is examined under everyday or extreme conditions to evaluate its durability, etc.
n (marine biology) The external calciferous shell, or endoskeleton, of an echinoderm, e.g. sand dollar|sand dollars and sea urchin|sea urchins.Image:Sea urchin tests.jpg|thumb|right|Two sea urchin tests
v (context|Academics) To administer or assign an examination that is given often during the academic term.
v To place a product or piece of equipment under everyday and/or extreme conditions and examine it for its durability, etc.
