guilloche
UK[ɡɪˈlɒʃ]US[ɡɪˈloʊʃ]
n
An architectural or decorative pattern of two or more interlacing curved bands.
Etymology
The word 'guilloche' entered English in the 19th century from the French term 'guillochis', which refers to an intricate, repetitive engraving technique. The French term is derived from the surname 'Guillot', likely referring to a specific engineer or craftsman, perhaps a Monsieur Guillot, who invented the engine-turning lathe used to create such patterns. The name 'Guillot' itself is a diminutive of the given name 'Guillaume' (William). Therefore, the modern abstract meaning of a precise, interlaced decorative pattern is directly linked to the mechanical process invented by an individual bearing that name.
Analysis
This word is a loanword adopted as a single, unsegmentable unit into English.
Examples
The certificate's border featured an elaborate gold guilloche to prevent forgery.
Guilloche patterns are commonly found on currency, passports, and high-end watch dials.
The artisan used a rose engine to engrave a complex guilloche on the silver box.