microcard

noun

mi·​cro·​card

ˈmīkrōˌkärd

: a sensitized card approximately 3 in. × 5 in. on which printed matter is reproduced photographically in greatly reduced form

Word History

First Known Use

1944, in the meaning defined above

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