IPA: /ˈtɪnˌpleɪt/
KK: /ˈtɪnˌpleɪt/
A thin sheet of iron or steel that is covered with a layer of tin, often used for making containers or packaging.
The food was stored in a tinplate can to keep it fresh.
Tinplate → It is formed from "tin" (from Old English "tinne", meaning a type of metal) and "plate" (from Old French "plate", meaning a flat piece). The word "tinplate" refers to a flat piece of metal that is coated with tin.
Think of a flat piece ('plate') made of a specific metal ('tin') — that's what tinplate is.