The Collaborative International Dictionary of English v.0.48:
Scrap \Scrap\ (skr[a^]p), n. [OE. scrappe, fr. Icel. skrap
trifle, cracking. See Scrape, v. t.]
1. Something scraped off; hence, a small piece; a bit; a
fragment; a detached, incomplete portion.
I have no materials -- not a scrap. --De Quincey.
2. Specifically, a fragment of something written or printed;
a brief excerpt; an unconnected extract.
3. pl. The crisp substance that remains after drying out
animal fat; as, pork scraps.
4. pl. Same as Scrap iron, below.
Scrap forgings, forgings made from wrought iron scrap.
(a) Cuttings and waste pieces of wrought iron from which
bar iron or forgings can be made; -- called also
(b) Fragments of cast iron or defective castings suitable
for remelting in the foundry; -- called also foundry
scrap, or cast scrap.