
(from the article `pile`) ...number of loops of warp threads, or else of an infinite number of free ends of either warp or of weft, or filling, threads that stand erect from ...
Found on
http://www.britannica.com/eb/a-z/l/72

The fiber in the carpet is looped and uncut. Can be either level loop or multi-level loop.
Found on
https://www.encyclo.co.uk/local/22737
No exact match found.