My old college textiles textbook says that over here in the Colonies the govt passed a law back in 1939, the Textile Fiber Products Identification Act, which specifies that "Wool, new wool, or virgin wool is wool fiber that has been through manufacturing processes only once."

The other terms are "Reprocessed Wool", which is wool reclaimed from scraps and processed again, but never used by a consumer, and "Reused Wool" which is wool salvaged from goods that consumers have already worn.

There are lots of other terms for other wool stuff...like wool sheared from living sheep is called shorn or fleece wool. Wool from slaughtered animals is called pulled wool.

Ron