The Collaborative International Dictionary of English v.0.48:
Barograph \Bar"o*graph\ (b[.a]*r[=o]"k[-o]), n. [Gr. ba`ros weight + -graph.] (Meteor.) An instrument for recording automatically the variations of atmospheric pressure. [1913 Webster]WordNet (r) 3.0 (2006):
barograph n 1: a recording barometer; automatically records on paper the variations in atmospheric pressure