Longman Dictionary of Contemporary English homepage

Date: 1600-1700
Language: Medieval Latin
Origin: laboratorium, from Latin laborare 'to work'

laboratory

 noun
     
Related topics: Buildings
la‧bor‧a‧tory W3 plural laboratories [countable]
TBB a special room or building in which a scientist does tests or prepares substances:
tests on laboratory animals
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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