alkenone

noun

al·​ke·​none ˈal-kə-ˌnōn How to pronounce alkenone (audio)
plural alkenones
: any of various long-chain unsaturated ketones that are produced by phytoplanktonic algae (such as the coccolithophores)

Note: Analysis of the chemical structure of alkenones present in marine sediment is used as a method to determine past sea temperatures.

To further the current climate debate, the chapter "Deep Sea Mud" explains how compounds such as alkenones, left by the marine alga Emiliania huxleyi, among other species, provide a temperature proxy.Karen Bushaw-Newton, Bioscience, 1 Sept. 2009

Word History

Etymology

alkene + -one

First Known Use

1945, in the meaning defined above

Time Traveler
The first known use of alkenone was in 1945

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Dictionary Entries Near alkenone

Cite this Entry

“Alkenone.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/alkenone. Accessed 22 Nov. 2024.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!