Bathygraph
/ˈbæθɪɡræf/noun
An instrument that records or measures the depth of water, especially in the sea.
Did you know?The word combines Greek roots for “deep” and “write,” turning the ocean floor into something that could be mechanically “read” through a trace on paper.
Etymological Timeline
Proto-Indo-European
PIE
*gʷem- / *gʷabʰ-
“A proposed Indo-European root associated with depth or sinking; the deeper ancestry of Greek bathýs is uncertain and debated.”
Ancient Greek
Greek
bathýs (βαθύς)
“Deep; profound; extending far downward.”
Ancient Greek
Greek
gráphein (γράφειν)
“To write, scratch, or inscribe.”
19th Century
Scientific English
bathygraph
“A coined scientific compound meaning an instrument for recording water depth.”
Modern English
English
bathygraph
“A device used to measure or record underwater depth, particularly ocean depth.”