telltale
n.— «The replacement part turns on a little telltale next to the odometer display indicating that the part has been replaced.» —“Re: reprogramming digital odometers” by Mike Griese (magriese@polaris.rchland.ibm.com) Usenet: rec.autos.marketplace Apr. 7, 1995. (source: Double-Tongued Dictionary)
Further reading
The entry for geranium lake in Webster’s Third New International Dictionary describes it as “a vivid red that is lighter and slightly yellower and stronger than apple red, yellower, lighter, and stronger than carmine, and bluer, lighter, and...
A caller wonders if she’s being hypersensitive about the way her boss addresses her in emails. Can the use of an employee’s first name ever reflect a power differential? And: a community choir director wants a term for “the act of...