Is this allowed? Wikipedia has a Creative Commons BY-AT license, so you need to name the source in all excerpts. How should it be handled? Ignore it? Make better excerpts? Or just name the source?
Better not. It's always better to reword it with your own words. I've seen this before and usually copy-paste excerpts are frowned upon. See also:
- Can we do anything against tag wikis copy-pasted from Wikipedia?
- Would it be OK to paste content from Wikipedia into a popular empty tag-wiki?
And so on... :)
Better to err on the safe side. Reword it, it's not that hard after all.