%bathy%

‖n. [ NL., fr. Gr. baqy`s deep + bi`os life ] (Zool.) A name given by Prof. Huxley to a gelatinous substance found in mud dredged from the Atlantic and preserved in alcohol. He supposed that it was free living protoplasm, covering a large part of the ocean bed. It is now known that the substance is of chemical, not of organic, origin. [ 1913 Webster ]

n. a natural family inclusing the mole rats and sand rats.
Syn. -- family Bathyergidae. [ WordNet 1.5 ]

n. a genus consisting of the mole rats.
Syn. -- genus Bathyergus. [ WordNet 1.5 ]

a. [ Gr. baqy`s deep + graphic. ] Descriptive of the ocean depth; as, a bathygraphic chart. [ Webster 1913 Suppl. ]

{ } a. Pertaining to bathymetry; relating to the measurement of depths, especially of depths in the sea. -- Bath`y*met"ric*al*ly, adv. [1913 Webster]

n. [ Gr. ba`qos depth + -metry. ] The art or science of sounding, or measuring depths in the sea. [ 1913 Webster ]

n. navigable deep diving vessel for underwater exploration.
Syn. -- bathyscape. [ WordNet 1.5 ]

n. a spherical deep diving apparatus (lowered by a cable) for underwater exploration; it is constructed with a strong steel shell to withstand high pressures at the ocean bottom. [ WordNet 1.5 +PJC ]

n. [ Iso- + Gr. &unr_; deep + &unr_; heat. ] (Phys. Geog.) A line connecting the points on the surface of the earth where a certain temperature is found at the same depth. [ 1913 Webster ]