Ozzy has largely got it covered. I'll just add the following:
In several decades of reading the 'Book Collector' magazine, I've hardly ever seen 'DJ' ('dust jacket') used by any professional bookseller. It's nearly always 'DW' ('dust wrapper').
'Poor', as indication of condition, is often substituted by 'reading copy only'.
The absence of something like 'second edition' at the front of a book doesn't necessarily mean that it's a first edition. The date of publication (crosss-checked against the British Library catalogue) is a far better indicator:
http://explore.bl.uk/primo_library/libweb/action/search.do?vid=BLVU1
Occasionally a bookseller will choose to indicate the size of a volume, using terms such as 'quarto' or 'octavo'. (That's particularly so where the illustrations in a book are as important as , or even more important than, the text). The meanings of such terms can be found here:
https://en.wikipedia.org/wiki/Book_size#Common_formats_and_sizes
Illustrated pages are commonly referred to as 'plates'. With some books, such as large Victorian volumes on ornithology or botany, the money that can be made by selling the plates individually can greatly exceed the privce that can be obtained by selling a book as a whole (but seek advice before cutting up a possibly valuable book!)