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1.
A book made of paper, predecessor to the ebook.
Because I love trees, I'm buying ebooks instead of treebooks. Okay, it's really because I love showing off my iPad. Still saving trees, though!
by cherryblossom June 22, 2010
 
2.
A book printed on dead trees, i.e. paper, as opposed to an e-book, which only exists electronically. Compare with snail mail.
Thomas: Hey, how do you like your new Kindle?
Andrew: I don't know, I haven't used it yet. I'm still trying to finish all the tree-books I'm reading.
by Cesar Augustus March 28, 2010