Citron
Part of speech: noun
Definition: a greenish yellow colour. a small citrus tree, Citrus medica the fruit of a citron tree. the candied rind of the citron fruit.
Part of speech: adjective
Definition: of a greenish yellow colour.
Lemon
Part of speech: adjective
Definition: Containing or having the flavour/flavor and/or scent of lemons.Of the pale yellow colour/color of lemons.
Part of speech: noun
Definition: A yellowish citrus fruit.A semitropical evergreen tree that bears such fruits.A taste or flavour/flavor of lemons.A more or less bright shade of yellow associated with lemon fruits.A defective or inadequate item.favour, favor.A piece of fanfiction involving explicit sex.
Example sentence: The most challenging work and the best work I've ever done was in a thing I did for PBS called 'Lemon Sky', a play by Lanford Wilson. I think it's the rawest, most complex work that I've had to do, and the thing I'm most proud of.