1. the act of attenuating or the state of being attenuated. 2. (General Physics) the loss of energy suffered by radiation as it passes through matter, esp as a result of absorption or scattering.
A healthy teenage boy may have a higher calorie intake of about 2,200 calories per day; about 61 to 86 g of fat should be consumed. Read more: http://www.livestrong.com/article/399246-a-teen-needs-how-many-grams-of-fat-per-day/#ixzz2QFhZ92Aj. For both teenage boys and girls, 5 to 6 tsp. of fat are recommended daily. Fat can't always be measured by the teaspoon, however, so it is easier to think of fat in actual percentages.
The USDA estimates that female teens need 1,800 to 2,400 calories per day and male teens need 2,000 to 3,200 calories per day. In comparison, adult females need 1,800 to 2,200 calories and adult males need 2,000 to 2,600 calories. Weight can determine whether a teen is eating an appropriate number of calories.