lab 
/ˈlæb/ noun
plural labs /ˈlæb/ noun [count] informal 1 : laboratory
▪ working in the lab ▪ a chemistry/computer/crime lab — often used before another noun ▪ a lab animal [=an animal used for experiments in a laboratory] ▪ a lab coat [=a coat worn over the clothes for protection from spills and stains in a laboratory] ▪ a lab report [=a written report of the results of work in a lab] 2 : a class period for laboratory work
▪ I have (a) lab today.
▪ working in the lab ▪ a chemistry/computer/crime lab — often used before another noun ▪ a lab animal [=an animal used for experiments in a laboratory] ▪ a lab coat [=a coat worn over the clothes for protection from spills and stains in a laboratory] ▪ a lab report [=a written report of the results of work in a lab]
▪ I have (a) lab today.
