alkenone
/ˈalkɪnəʊn/Chemistry and Geology
noun
A ketone containing an unsaturated hydrocarbon group with one or more carbon–carbon double bonds.
- Many unsaturated long-chain alkenones are produced by certain phytoplankton, and the distribution of alkenones in sediments and their degree of unsaturation have been used as a means of determining past sea temperatures..
Origin
1940s; earliest use found in U.S. Patents. From alkene + -one.