
Research done in a laboratory. A laboratory study may use special equipment and cells or animals to find out if a drug, procedure, or treatment is likely to be useful in humans. It may also be a part of a clinical trial, such as when blood or other samples are collected. These may be used to measure the effect of a drug, procedure, or treatment on ...
Found on
http://www.cancer.gov/dictionary?expand=L

Research done in a laboratory. These studies may use test tubes or tests on animals to find out if a drug, procedure, or treatment is likely to be useful. Laboratory studies take place before any testing is done in humans.
Found on
https://www.encyclo.co.uk/local/20753
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