Etymology
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laboratory (n.)

c. 1600, "room or building set apart for scientific experiments," from Medieval Latin laboratorium "a place for labor or work," from Latin laboratus, past participle of laborare "to work" (see labor (v.)). Figurative use by 1660s.

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Definitions of laboratory

laboratory (n.)
a workplace for the conduct of scientific research;
Synonyms: lab / research lab / research laboratory / science lab / science laboratory
laboratory (n.)
a region resembling a laboratory inasmuch as it offers opportunities for observation and practice and experimentation;
Pakistan is a laboratory for studying the use of American troops to combat terrorism
Synonyms: testing ground
From wordnet.princeton.edu