pentacosane

noun

pen·​ta·​co·​sane

-ˈkōˌsān

plural -s

: a paraffin hydrocarbon C₂₅H₅₂

especially : the crystalline normal hydrocarbon CH₃(CH₂)₂₃CH₃

Word History

Etymology

International Scientific Vocabulary penta- + eicosane

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