Definition of laboratory:

part of speech: noun

A chemist's workroom.

part of speech: noun

A chemist's workroom: a place where scientific experiments are systematically carried on: a place for the manufacture of arms and war- material: a place where anything is prepared for use.

part of speech: noun

A place where scientific experiments and operations are carried on.

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A solid fence of stone, brick, etc.; the outside structure which incloses a building; a partition forming the side of a room; a structure for defense; means of protection. ...