IPA: /bæˈθɪmətri/
KK: /bæˈθɪmətri/
The study and measurement of how deep water is in oceans, lakes, and other bodies of water.
Scientists use bathymetry to map the ocean floor and understand underwater features.
Bathymetry is formed from "bathy-" (from Greek "bathus", meaning deep) and "-metry" (from Greek "metron", meaning measure). The word refers to the measurement of depths, particularly in oceans or seas.
Think of 'deep' ('bathy-') and 'measure' ('-metry') to remember that bathymetry is all about measuring how deep something is.