Webster's English Dictionary

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laboratory

lab.o.ra.to.ry \'lab-(*-)r*-.to-r-e-, -.to.r-, Brit usu l*-'ba:r-*-t(*-)re 
   n [ML laboratorium, fr. L laboratus, pp. of laborare to labor,]B- often 
   attrib fr. labor 1: a place equipped for experimental study in a science or 
   for testing and  analysis; broadly : a place providing opportunity for 
   experimentation, observation, or practice in a field of study 2: an 
   academic period set aside for laboratory work