Cognitive and cultural embeddedness: combining institutional economics and economic sociology
According to this, pederasty is sexual relations between two males, especially when one of them is a minor. Other definitions, like the one that JSBangs found, differ slightly. But otherwise, I think you answered the question yourself: pedophile refers to the attraction, while pederasty refers to the act itself.
General Description of Plastids. Plastid is a term applied to an organelle that is exclusive to plant cells. Most of the compounds important to a plant, and to human diet, start out in the plastid. It is the place in the cell where carbohydrates, fats, and amino acids are made.