etch figure

noun

variants or etching figure

: a marking consisting usually of a minute pit produced by a solvent on the crystal face of a mineral and revealing its molecular structure

—usually used in plural

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