emergent

noun

A plant whose root system grows underwater, but whose shoot, leaves and flowers grow up and above the water.

1. Emerging; coming into view or into existence; nascent; new.
2. Arising unexpectedly, especially if also calling for immediate reaction; constituting an emergency.
3. Taller than the surrounding vegetation.
4. (of a water-dwelling plant) Having leaves and flowers above the water.
5. Having gameplay that arises from its mechanics, rather than a linear storyline.
6. Having properties as a whole that are more complex than the properties contributed by each of the components individually.