ETYM French rivčre a river, Late Lat. riparia river, bank of a river, from Latin riparius belonging to a bank or shore, from ripa a bank or shore; of uncertain origin. Related to Arrive, Riparian.
A large natural stream of water (larger than a creek).
Long water course that flows down a slope along a channel. It originates at a point called its source, and enters a sea or lake at its mouth. Along its length it may be joined by smaller rivers called tributaries. A river and its tributaries are contained within a drainage basin.
One way of classifying rivers is their stage of development. A youthful stream is typified by a narrow V-shaped valley with numerous waterfalls, lakes, and rapids. When maturity is reached the river is said to be graded; erosion and deposition are delicately balanced as the river meanders across the extensive floodplain. At this stage the floodplain is characterized by extensive meanders, ox-bow lakes and levées.
ETYM as. streám; akin to OFries. strâm, os. strôm, Dutch stroom, German strom, Old High Germ. stroum, strűm, Dan. and Swed. ström, Icel. straumr, Irish sroth, Lith. srove, Russ. struia, Greek rysis a flowing, rein to flow, Skr. sru. Related to Catarrh, Diarrhea, Rheum, Rhythm.
1. A natural body of running water flowing on or under the earth; SYN. watercourse.
2. Dominant course (suggestive of running water) of successive events or ideas; SYN. flow, current.
3. Something that resembles a flowing stream in moving continuously; SYN. flow.
ETYM AS. waeter.
1. A clear colorless odorless tasteless liquid; SYN. H2O.
2. (Archaic) Once thought to be one of four elements composing the universe.
H2O liquid without color, taste, or odor. It is an oxide of hydrogen. Water begins to freeze at 0şC or 32şF, and to boil at 100şC or 212şF. When liquid, it is virtually incompressible; frozen, it expands by 1/11 of its volume. At 4şC/39.2şF, one cubic centimeter of water has a mass of one gram; this is its maximum density, forming the unit of specific gravity. It has the highest known specific heat, and acts as an efficient solvent, particularly when hot. Most of the world’s water is in the sea; less than 0.01% is fresh water.
Water covers 70% of the Earth's surface and occurs as standing (oceans, lakes) and running (rivers, streams) water, rain, and vapor and supports all forms of Earth's life.
Water makes up 60–70% of the human body or about 40 liters/42 quarts, of which 60% is inside the cells, 40% outside. A loss of 10% of this volume may cause hallucinations; a loss of 20%-25% may cause death. People cannot survive more than five or six days without water or two or three days in a hot environment.