acidoid

1 of 2

adjective

ac·​id·​oid

ˈa-sə-ˌdȯid

of certain solid substances

: like acid : potentially acid

acidoid

2 of 2

noun

ac·​id·​oid

ˈa-sə-ˌdȯid

plural -s

: an acidoid substance

Word History

Etymology

Adjective

acid entry 2 + -oid

First Known Use

Adjective

1931, in the meaning defined above

Noun

circa 1929, 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