WordReference Random House Learner's Dictionary of American English © 2017
lab•o•ra•to•ry /ˈlæbrəˌtɔri, ˈlæbərə-/USA pronunciation   n.[countable]pl.  -ries. 
  1. Chemistrya place with equipment to conduct scientific experiments or tests, or in which to manufacture chemicals, medicines, or the like.
  2. a building or room in a school or university with equipment for certain subjects:a language learning laboratory.
See -lab-.
WordReference Random House Unabridged Dictionary of American English © 2017
lab•o•ra•to•ry  (labrə tôr′ē, -tōr′ē, labər ə-;[Brit.]lə borə tə rē, -ə trē),USA pronunciation n., pl.  -ries, adj. 
  1. a building, part of a building, or other place equipped to conduct scientific experiments, tests, investigations, etc., or to manufacture chemicals, medicines, or the like.
  2. any place, situation, set of conditions, or the like, conducive to experimentation, investigation, observation, etc.;
    anything suggestive of a scientific laboratory.

  1. serving a function in a laboratory.
  2. relating to techniques of work in a laboratory:laboratory methods; laboratory research.
lab′o•ra•tori•al, adj. 
lab′o•ra•tori•al•ly, adv. 
lab′o•ra•tori•an, n. 
  • Medieval Latin labōrātōrium workshop, equivalent. to Latin labōrā(re) to labor + -tōrium -tory2
  • 1595–1605

Collins Concise English Dictionary © HarperCollins Publishers::

laboratory /ləˈbɒrətərɪ -trɪ; US: ˈlæbrəˌtɔːrɪ/ n ( pl -ries)
  1. a building or room equipped for conducting scientific research or for teaching practical science
  2. (as modifier): laboratory equipment
  3. a place where chemicals or medicines are manufactured

Often shortened to: lab Etymology: 17th Century: from Medieval Latin labōrātōrium workshop, from Latin labōrāre to labour

'laboratory' also found in these entries:

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