culasse

OBS: En anglais, ne pas confondre «pavilion», la culasse, avec «pavilion facets», les pavillons.

CONT: Both on the crown (the part above the girdle, i.e. the plane with the greatest diameter) as on the pavilion (the part under the girdle), 4 facets are first placed.
OBS: In North America and Britain, the portion of a fashioned stone below the girdle is called ""pavilion."" On European continent, the pavilion is the part above the girdle, the portion below being known as the culasse.