1. A sample grabbed at random; SYN. grab sample.
2. A sample in which every element in the population has an equal chance of being selected.

ETYM Old Eng. sample, asaumple, Old Fren. essample, example, from Latin exemplum. Related to Example, Ensample, Sampler.
1. A small part of something intended as representative of the whole.
2. All or part of a natural object that is collected and preserved as an example of its class.

1. A test limited to a few key or sample points or a relatively small percentage of random spots
2. A test conducted on the spot to yield immediate results