the world > space > relative position > condition of being external > enclosing or enclosure > [noun] > an enclosed space or place > compartment or chamber > having a function (2)
Biology. Any of various larger chambers in the structure of a tissue or organism, typically with known functions. Now largely disused, except in B…
a room or enclosure in which dust, microorganisms, and other contaminants are eliminated or reduced to very low levels, esp. for the purpose of…