an automatic hygrometer that produces a graphic record of the humidity of the air
hygrograph in American English
(ˈhaɪgroʊˌgræf; ˈhaɪgrəˌgræf)
noun
a hygrometer for continuously recording atmospheric humidity
hygrograph in American English
(ˈhaiɡrəˌɡræf, -ˌɡrɑːf)
noun
a self-recording hygrometer
Word origin
[1860–65; hygro- + -graph]This word is first recorded in the period 1860–65. Other words that entered Englishat around the same time include: big brother, blind spot, monism, pop-up, trade name-graph is a combining form meaning “drawn,” “written” (lithograph; monograph). It is specialized in meaning to indicate the instrument rather than the writtenproduct of the instrument (telegraph; phonograph)