| product life cycle | |
| —n | |
| marketing the four stages (introduction, growth, maturity, and decline) into one of which the sales of a product fall during its market life | |
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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. |