A component is a part or element of something larger. It is a piece that contributes to the overall structure or functioning of a whole. Full definition
For example, fewer circulating estrogen hormones lead the body to retain more fat cells as an alternative source of components of estrogen. (34-menopause-symptoms.com)
Third, a number of components in program spending are directly related to the circumstances of the day, e.g. defence spending, disaster assistance, etc.. (3dpolicy.ca)
So he is responsible for establishing metrics by which the company tracks the effectiveness of key components of its business model. (townepark.com)