extrinsic

The word extrinsic refers to anything that comes from outside something else: qualities, motivations, rewards, or influences that are not a natural part of the thing itself. It is often used when discussing motivation, value, or characteristics.

Think about why someone might volunteer their time. If they do it because they genuinely care about helping others, that is intrinsic motivation because it comes from within. But if they volunteer simply to look good on a college application, that is an extrinsic motivator because the reason lies outside the act itself.

In science, particularly in biology and chemistry, extrinsic factors are external influences affecting a system. For example, temperature or light can be considered extrinsic factors influencing plant growth.

The term is also used to describe things that are not essential or fundamental. An extrinsic muscle is one located outside the organ it moves, while an intrinsic muscle is part of the organ itself. Similarly, extrinsic value refers to worth derived from external sources, like market price, rather than from inherent quality.

So, whenever you encounter something shaped by outside forces, outside rewards, or outside conditions rather than by its own nature, the word extrinsic is often the right fit. At its core, it is about what comes from the outside.