I found this article in Variety which is about animation production in London.
I have no idea what a "long-form toon skeins" are but it looks like everyone in London is going to be busy. From what I have been reading, there looks like there is going to be an animation renaissance for the next ten years.
Here is the link:
http://www.variety.com/article/VR1118012207.html?categoryid=19&cs=1
In "Variety-speak" a skein = television series.
Take a look here:
http://www.variety.com/index.asp?layout=slanguage
.
Thanks, the internet was of no help. The two definition I did find had nothing to do with the industry.