Noun laboratory has 2 senses
  1. lab, laboratory, research lab, research laboratory, science lab, science laboratory - a workplace for the conduct of scientific research
    --1 is a kind of workplace, work
    --1 has parts: lab bench, laboratory bench
    --1 has particulars:
     biology lab, biology laboratory, bio lab; chemistry lab, chemistry laboratory, chem lab; defense laboratory; physics lab, physics laboratory
  2. testing ground, laboratory - a region resembling a laboratory inasmuch as it offers opportunities for observation and practice and experimentation; "the new nation is a testing ground for socioeconomic theories"; "Pakistan is a laboratory for studying the use of American troops to combat terrorism"
    --2 is a kind of region