Definitions for "loupe"
Any of a variety of small magnifying glasses, having a magnifying power from 2X to 20X, commonly of 10X, which may be held in the hand, or in some cases held within the eyesocket without the use of a hand. It is commonly used by jewelers and watchmakers.
An optical device containing a precision ruler used to observe very small details. See also: linen tester; magnifier.
A small free-standing magnifier used to see fine detail on a page or view photographs.
Keywords:  burl, french
(French): Burl.