Derrida read a lot of Heidegger, even wrote some essays on him before Gramma-whatever. Heidegger used the german phrase "destruktion" of the basic ontology of western society. Go look that up too.
The only bit of Heidegger I'm going to read is his where he talks about technology. Other than that I'm going to give him a wide enough berth because I don't like his writing style. He can be as profound as he likes and he can destruct whatever ontologies he's into but after having flipped through a bit of Being and Time I have to say no thanks.
And in fairness destruktion is not de_construction_. You still haven't told me where to look it up though. Chapter and verse and all that, no?
edit: ok, so FreakLegion[1] hereabouts has some pointers and I used my Google-fu and got this[2] which looks helpful. But even that says that Derrida got inspiration but that the terms are not used in the same sense.
I don't have time to read all of B+T because (a) I'm not into the style, and (b) it's a major work that is not related to my studies. So I just want the part that talks about destruktion but it's ok FreakLegion told me so you don't have to.