[hahy-druh-speys] /ˈhaɪ drəˌspeɪs/
the regions beneath the surface of the oceans and seas.
The regions beneath the ocean’s surface, especially when considered as an area to be studied, as in marine mammal research or sonar mapping of the ocean floor.
noun See hydrospeeding
noun an extreme sport involving river descent using a special board; also called hydrospeed
[hahy-druh-sfeer] /ˈhaɪ drəˌsfɪər/ noun 1. the water on or surrounding the surface of the globe, including the water of the oceans and the water in the atmosphere. /ˈhaɪdrəˌsfɪə/ noun 1. the watery part of the earth’s surface, including oceans, lakes, water vapour in the atmosphere, etc n. 1887, from hydro- + sphere. hydrosphere (hī’drə-sfîr’) All […]
[hahy-druh-stat] /ˈhaɪ drəˌstæt/ noun 1. an electrical device for detecting the presence of water, as from overflow or leakage. 2. any of various devices for preventing injury to a steam boiler when its water sinks below a certain level. /ˈhaɪdrəʊˌstæt/ noun 1. a device that detects the presence of water as a prevention against drying […]