IPA: /ˈɒnleɪ/
KK: /ˈɒnleɪ/
A type of dental or medical covering that is placed over a surface, often to restore or enhance its function or appearance.
The dentist recommended an onlay to repair the damaged tooth.
The word 'onlay' originates from the combination of 'on-' (meaning upon or on) and 'lay' (from Old English 'leah', meaning to place or put down). The term refers to the act of placing something upon a surface, particularly in the context of dental work where a material is placed on a tooth surface.
Think of 'placing something upon' ('on-') a surface ('lay') — that's what onlay means.