the circular indentation on the upper part of a type body, made by the pin that ejects the type from the caster.
Origin of pin mark
First recorded in 1885–90
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for pin mark
Historical Examples of pin mark
Pin-mark—The little mark sometimes seen on the side of foundry-made type.Type
A. A. Stewart