mercury barometer(n = noun.artifact) - barometer that shows pressure by the height of a column of mercury;
is a kind of barometer

aneroid barometer, barometer, bichloride of mercury, dog mercury, dog's mercury, fulminate of mercury, fulminating mercury, herb mercury, herbs mercury, mercury, mercury bichloride, mercury cell, mercury chloride, mercury fulminate, mercury poisoning, mercury program, mercury thermometer, millimeter of mercury, poison mercury, three-seeded mercury, water barometer