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| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
| green revolution | |
| —n | |
| the introduction of high-yielding seeds and modern agricultural techniques in developing countries | |
| green revolution
The application of science to increasing agricultural productivity, including the breeding of high-yield varieties of grains, the effective use of pesticides, and improved fertilization, irrigation, mechanization, and soil conservation techniques. |
The increase in the world production of cereals such as wheat and rice during the 1960s and 1970s because of better seed and new agricultural technology.
Note: The green revolution greatly increased the availability of food and confounded predictions of worldwide famine that had been made in the early 1970s.