hydrology
- n the branch of geology that studies water on the earth and in the atmosphere: its distribution and uses and conservation
hydrolysis
- n a chemical reaction in which water reacts with a compound to produce other compounds; involves the splitting of a bond and the addition of the hydrogen cation and the hydroxide anion from the water
hydromancy
- n divination by water (as by patterns seen in the ebb and flow of the tides)
hydromantes brunus
- n similar to Shasta salamander; lives in cliff crevices and taluses
hydromantes shastae
- n primarily a cave dweller in the Mount Shasta area
hydrometer
- n a measuring instrument for determining the specific gravity of a liquid or solid
hydromorphone
- n a narcotic analgesic (trade name Dilaudid) used to treat moderate to severe pain
hydromorphone hydrochloride
- n a narcotic analgesic (trade name Dilaudid) used to treat moderate to severe pain