Alternative form of Test match

Which has been tested on the battleground. / (figuratively) Which has been successfully put to the test in a real-life situation, in conditions of real use.

plural of diehard test

(computing) Any of a collection of statistical tests for gauging the randomness of a random number generator.

(law, US) A judicial test as to whether a US state is bound by the United States Bill of Rights in relation to a specific right claimed by the plaintiff, hinging on whether the due process clauses of the Fifth and Fourteenth Amendments to the US Constitution override the immunity which ordinarily applies to states; specifically, the right in question must be "of the very essence of a scheme of ordered liberty" and "deeply rooted in [American] history and tradition" in order to qualify.

present participle of field-test

(sciences) A form of scientific testing in which some information is withheld from two different parties. Most commonly, neither the tester nor the subjects tested know which are the control items and which are the test items.

(idiomatic) To remain useful or valued over a long period of time; to last a long time.

A baby who was conceived by in vitro fertilisation and then implanted in the uterus of the mother.

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.