(n.) The workroom of a chemist; also, a place devoted to experiments in any branch of natural science; as, a chemical, physical, or biological laboratory. Hence, by extension, a place where something is prepared, or some operation is performed; as, the liver is the laboratory of the bile.
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Webster, Noah. Entry for 'Laboratory'. Noah Webster's American Dictionary. https://www.studylight.org/dictionaries/eng/web/l/laboratory.html. 1828.