Culet

n. the small flat surface at the back or bottom of a brilliant: the part of armour protecting the body behind from the waist downwards—also Culette.

手打:帕特丽夏

• It has fifty-eight facets, of which thirty-three, including the table, are above the girdle and twenty-five, including the culet, below the girdle. 佚名. 神奇的知识之书.
• Each facet of a diamond (by reason of the method of cutting) is a window looking down a clearly defined walled chamber, like a hall-way to the culet. 佚名. 神奇的知识之书.

手打:帕特丽夏