Definition of plastoquinone in US English:

plastoquinone

noun

Biochemistry
  • Any of a homologous series of compounds which have a quinone nucleus with a terpenoid side chain; specifically one of these occurring in the chloroplasts of plants and involved in electron transfer during photosynthesis.

Origin

1950s. From plast- + -o- + quinone.

Pronunciation

plastoquinone

/ˌplastə(ʊ)ˈkwɪnəʊn/