I've been confused lately by the use of "Polo" to describe necklines in some of the books I've been reading lately (I borrowed almost every "style" book my library has LOL). Polo seems to be a term used for what I consider a turtleneck.

So, of the two pics, what do you consider a Polo?

I would consider this one a turtleneck:
http://www.tallulahfashion.com.....k-2359.htm

And this a polo:
http://www.ralphlauren.com/pro.....age=family

What do you think? Are the terms interchangeable for *turtlenecks*, and if so, what then do you call what I call a *polo*?