A small magnifying glass usually set in an eyepiece and used chiefly by watchmakers and jewelers. (noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "loupe" in a sentence
"Aside from the technical gear, average shoppers can snag a swan-shaped velvet ring box ($2) or jewelry soap ($3.95), or get a close look at their own gems with the jeweler's monocle known as a loupe ($20 to more than $100)."
"“That good?” he asked, putting down the photographer’s proofs of turkeys—Matt was on the Butterball campaign—that he was studying with a little magnifying glass called a loupe."
"Continuing to cruife at the entrance of the Channel, on the 31ft of Oflober he took a French (hip from Guada - loupe, which is faid by fome to have mounted forty guns, and to have had on board a cargo valued at upwards of one hundred thoufand pounds."