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pentamethylene

American  
[pen-tuh-meth-uh-leen] / ˌpɛn təˈmɛθ əˌlin /

noun

Chemistry.

  1. cyclopentane.

Etymology

Origin of pentamethylene

penta- + methylene

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.