afocal

adjective

afo·​cal

(ˈ)ā-¦fō-kəl

physics

: having focal points infinitely distant

an afocal lens

Word History

Etymology

a- entry 2 + focal

First Known Use

1887, 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