altigraph
/ˈaltɪɡrɑːf/ /ˈaltɪɡraf/ /ˈɔːltɪɡrɑːf/(also altograph) Aeronautics and Science Fiction
noun
An altimeter, especially one that produces a graphical record of its measurements.
Origin
Early 20th century; earliest use found in Circular United States Bureau of Standards. From alti- + -graph, probably after altimeter.