Learn how to say Citron correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word citron:
a yellow, thick-skinned fruit resembling a lime or lemon but larger and less acid
the semitropical tree (Citrus medica) of the rue family bearing this fruit
the candied rind of this fruit, used as a confection, in fruitcake, etc.
(US) citron melon