IPA: /ˈɡlænsər/
KK: /ˈɡlænsər/
A person who glances or looks quickly at something.
The glancer quickly scanned the room before leaving.
Glancer → It is formed from "glance" (from Old French *glancer*, meaning to shine or to glance) and the suffix "-er" (meaning a person who). A glancer is a person who glances or looks quickly.
Think of someone who 'shines' or 'looks quickly' — that's what a glancer does.