A frog is the end of the bow of a stringed instrument that includes the nut - the mechanism which alters the tautness of the hairs.
A frog in sewing is a sort of closure, often used in cloaks, made from a specially knotted cord forming a button of sorts, and a loop on the other side of the closure, forming an effective button hole.
Fact-index.com financially supports the Wikimedia Foundation. Displaying this page does not burden Wikipedia hardware resources. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.