pin mark

noun

1

: a slight indentation in the side of a piece of foundry type made by the pin that pushes the type from the mold

2

: the mark on the bottom of a piece of ceramic ware made by a pin supporting it during firing

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now