gadroon
Any of a series of raised decorative curves used as adornments on the necks of vases, silverware, etc.
Owing possibly to some flaw in his mental make-up, Uncle Tom has been collecting old silver since I was so high […]. I knew all about that collection of his, not only because I had had to listen to him for hours on the subject of sconces, foliation, ribbon wreaths in high relief and gadroon borders, but because I had what you might call a personal interest in it, once having stolen an eighteenth-century cow-creamer for him.
A godroon.
Where it comes from
From French godron, from Middle French goderon, from a form of godet (“vase with wavy edges”) + -(e)ron, from Dutch kodde (“piece of cylindrical wood”). Also probably related to goder (“to pucker”).
Adapted from the Wiktionary entry gadroon (CC BY-SA 4.0).