Definition of laboratory noun from the Oxford Advanced American Dictionary

  

laboratory

 noun
noun
NAmE//ˈlæbrəˌtɔri//
 
(pl. laboratories)(informal lab)
 
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  a room or building used for scientific research, experiments, testing, etc. a research laboratory laboratory experiments/tests to send a specimen to the laboratory for analysis see also language laboratory
See the Oxford Advanced Learner's Dictionary entry: laboratory