barograph

American  

[bar-uh-graf, -grahf] / ˈbær əˌgræf, -ˌgrɑf /

noun

1. any of several automatic recording barometers, of which the most common is the aneroid barograph.

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barograph British  

/ ˌbærəˈɡræfɪk, ˈbærəˌɡrɑːf, -ˌɡræf /

noun

1. meteorol a self-recording aneroid barometer

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barograph Scientific  

/ băr′ə-grăf′ /

1. 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.

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Other Word Forms

• barographic adjective

Etymology

Origin of barograph

First recorded in 1860–65; baro- + -graph

Example Sentences

A representative of the National Aeronautic Association shipped their sealed, clock-controlled barograph to Washington.

From Time Magazine Archive

A logbook and barograph, still intact, showed that the balloon had climbed to 72,178 ft.�

From Time Magazine Archive

Next day he had the barograph but a quartering wind slowed him to 282 m.p,h.—.77 less than the necessary margin over the old record.

From Time Magazine Archive

He also thought his barograph would show a new U. S. altitude mark of 5,000 ft. or more.

From Time Magazine Archive

"Now we ought to go up," the young inventor murmured, as he anxiously watched the barograph, and noted the position of the swinging pendulum which told of the roll and dip of the air craft.

From Tom Swift and His Air Glider, or Seeking the Platinum Treasure by Appleton, Victor [pseud.]