annulus
演变路径（由近及远）
- 英语
- 书面借自 ←中世纪拉丁语 ānnulus
- 源自 ←拉丁语 ānulus “ring, especially one worn on a finger”
- 源自 ←原始印欧语 *h₁eh₂-n-o- “ring”
词源说明
Learned borrowing from Medieval Latin ānnulus, a misspelling of Latin ānulus (“ring, especially one worn on a finger”), from ānus (“ring”) (possibly from Proto-Indo-European *h₁eh₂-n-o- (“ring”), from an uncertain root) + -ulus (diminutive suffix).
The plural form annuli is a learned borrowing from Medieval Latin ānnulī.