adamantane

noun

ad·​a·​man·​tane

ˌa-də-ˈman-ˌtān

plural -s

: a crystalline high-melting hydrocarbon C₁₀H₁₆ having the carbon atoms of its skeleton in the same tricyclic pattern found in the space lattice of the diamond; symmetrical tricyclo-decane

Word History

Etymology

International Scientific Vocabulary adamant entry 2 + -ane; probably originally formed as German adamantan

First Known Use

1933, 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