atrium Atriplex • atrocha · · · Info · Definitions · Characters · · atrium · · Text Latin · · Script 6 · · Length Definitions · · · (noun) any chamber that is connected to other chambers or passageways (especially one of the two upper chambers of the heart). · · Noun Definition 1 (noun) the central area in a building; open to the sky. · · Noun Definition 2 Characters · · a latin small letter a U+0061 i latin small letter i U+0069 m latin small letter m U+006D r latin small letter r U+0072 t latin small letter t U+0074 u latin small letter u U+0075