If a product contains bleach (peroxide), it will whiten your teeth. But not all treatments are created equal. It's the concentration or percent of hydrogen peroxide a teeth-whitening system contains and the amount of time it's in contact with your teeth that determines its effectiveness.
Definition of fecund - producing or capable of producing an abundance of offspring or new growth; highly fertile Definition of fecund - producing or capable of producing an abundance of offspring or new growth; highly fertile
(fÊnd) n. 1. a supply of money or monetary resources, as for some purpose. 2. supply; stock: a fund of knowledge. 3. funds, money immediately available; pecuniary resources. 4. an organization created to manage the resources of a monetary fund.