Verb
Not erect; inclined; -- said of anything that is usually erect, as an escutcheon.
Lying on its side; thus, a chevron couche is one which emerges from one side of the escutcheon and has its apex on the opposite side, or at the fess point.
Source: Webster's dictionaryKnown as a couche, the flax cloth is used to hold the dough into shape while in the final rise, just before baking. Source: Internet
The floured couche makes a "non stick" surface to hold the dough. Source: Internet