plastoquinone

noun

plas·​to·​qui·​none ˌpla-(ˌ)stō-kwi-ˈnōn  -ˈkwi-ˌnōn 

: a plant substance that is related to vitamin K and plays a role in photosynthetic phosphorylation

Word History

Etymology

Greek plastos + English quinone

First Known Use

1958, in the meaning defined above

Medical Definition

plastoquinone

noun

plas·​to·​qui·​none ˌplas-(ˌ)tō-kwin-ˈōn  -ˈkwin-ˌōn 

: any of a group of substances that occur mostly in plant chloroplasts, are related to vitamin K, and play a role in photosynthetic phosphorylation