An abandoned meander in a river or stream, caused by neck cutoff Used to describe the U-shaped bend in the river or the land within such a bend of a river
lake curved lake found on the flood plain of a river Oxbows are caused by the loops of meanders being cut off at times of flood and the river subsequently adopting a shorter course oxidation form of chemical weathering caused by the chemical reaction that takes place between certain iron-rich minerals in rock and the oxygen in water It tends to result in the formation of a red-coloured soil or deposit ozone highly reactive pale-blue gas; a type of oxygen It forms a layer in the upper atmosphere, which protects life on Earth from ultraviolet rays, a cause of skin cancer At lower atmospheric levels it is an air pollutant and contributes to the greenhouse effect A continent-sized hole has formed over Antarctica as a result of damage to the ozone layer, caused in part by the emission of chloro- fluorocarbons (CFCs)
A frame of wood, bent into the shape of the letter U, and embracing an ox's neck as a kind of collar, the upper ends passing through the bar of the yoke; also, anything so shaped, as a bend in a river
a wooden framework bent in the shape of a U; its upper ends are attached to the horizontal yoke and the loop goes around the neck of an ox a U-shaped curve in a stream the land inside an oxbow bend in a river