heterotrophic 

An organism that depends on consuming other autotrophic organisms to survive

Humans are heterotrophic, whereas plants are autotrophic.

heterotrophic by Ilan321 November 18, 2013

heterotrophic guilt 

The realization that no matter which diet you follow, you're still eating organisms that were alive at one point, and we have murdered them for our own benefit.

Apparently plants can think and remember? We're killing sentient beings! Crap! Dude, I'm feeling all kinds of heterotrophic guilt right now.

heterotrophic guilt by MacBabe September 11, 2014