IPA: /ˈnoʊt.keɪs/
KK: /ˈnoʊtˌkeɪs/
A small case or wallet used to hold paper money and sometimes cards.
He took out his notecase to pay for the meal.
Notecase → It is formed from "note" (from Latin "nota", meaning a mark or sign) and "case" (from Latin "capsa", meaning a box or container). A notecase is a container for notes or written marks.
Think of a 'mark' or 'sign' ('nota') being kept in a 'box' or 'container' ('case') — that's what a notecase is, a box for your notes.