What does "quinone" mean?

Any of a class of aromatic compounds having two carbonyl functional groups in the same six-membered ring.

Quinone

Common synonyms include: aromatic diketone, benzoquinone, coenzyme q, cyclic diketone, p benzoquinone, para benzoquinone.

/ˈkwɪnəʊn/ noun

noun ·Rare ·Advanced level

Noun

1
Any of a class of aromatic compounds having two carbonyl functional groups in the same six-membered ring.
2
any of a class of aromatic yellow compounds including several that are biologically important as coenzymes or acceptors or vitamins; used in making dyes wordnet

From quinic acid + -one, since it is one of the compounds obtained upon oxidation of quinic acid.