I forget a term and it's pissing me off

[anisotropic]

In evolution, the definition is something along the lines of:

When one individual increases the fitness of another individual either directly or indirectly, at the cost of decreasing its own fitness. (many argue there is no true form of this)

By the way, it is not related to symbiosis in any way.

I forget what the damn word is, but I need to remember it. Can anyone help me out?

 

[GoneRogue]

Does it have something to do with altruism?

 

[anisotropic]

Bingo, thanks.

 

[Phobos]

(many argue there is no true form of this)

It is an interesting debate...whether selection functions at the level of a population, an individual, or a gene.