nappe

plural nappes

1. The profile of a body of water flowing over an obstruction in a vertical drop.
2. mathematicsEither of the two parts of a double cone.
3. geographyA sheet-like mass of rock that has been folded over adjacent strata.

   The generation of an Alpine mountain range is a matter of piling on the nappes.

   2004, Richard Fortey, The Earth, Folio Society, published 2011, page 96

   Synonyms: thrust sheet

4. engineeringGeological nappe whose underside is not in contact with the overflow structure and is at ambient atmospheric pressure.
5. cookingThe ability of a sauce or other relatively thick liquid to coat food, the back of a spoon, etc.

present singular third person nappes · participle present napping · participle past napped · past napped

1. cookingTo coat (a food) with liquid.

   to nappe a leg of lamb with glaze