indicator; display item; something indicative of
A formal or technical noun meaning something that indicates, displays, or represents something else. Often used in legal, technical, or official contexts.
This document will be kept as an indicator of the contract details.
At the exhibition, many display items for the new products were lined up.
Compound of 表示 (display, indication) and 物 (thing, object). The exact historical derivation is uncertain, but the word follows a common pattern for forming technical nouns.