Rondelle

Part of speech: noun

Definitions

1. A small, usually flat ring made of various materials that serves specific functions in machinery or construction contexts
2. A circular object, often thin, utilized to provide spacing or sealing in mechanical devices or culinary tools
3. A thin, circular disc typically crafted from materials such as metal or rubber that serves to separate, seal, or reinforce various components in both mechanical and culinary applications

Etymology: Rondelle reaches English from French, where it means a small disc or round thing, and it is a diminutive of "rond," meaning round. The French word itself carries the shape in its name, which is why the English term has stayed attached to circular, flat objects. Its engineering use is the familiar one: a washer, a bearing ring, or a small round plate that fits onto a shaft or spindle. The word is also a doublet of "redondilla," a Spanish term for a short verse form, so two English-facing words have come from the same root by different routes. The Spanish line followed the same idea of roundness, since a redondilla is a compact stanza built around a rounded, self-contained pattern, while the French line kept the sense of a small disc. Both trace back to the Latin "rotundus," meaning round.