[bar-uh-graf, -grahf] 
| any of several automatic recording barometers, of which the most common is the aneroid barograph. |
| bar·o·graph (bār'ə-grāf') n. A recording barometer. bar'o·graph'ic adj. |
| barograph (bār'ə-grāf') Pronunciation Key
An instrument that continuously records changes in atmospheric pressure. A barograph typically consists of an aneroid barometer connected to a pen; the pen is in contact with a piece of paper mounted on a cylinder that rotates once on a daily or weekly basis. As the atmospheric pressure changes, the pen is displaced in proportion to the change, thus a record of the pressure is traced onto the rotating sheet of paper. |
əˌgræf