Question about article 'le' and feminine plural
Hello all,
I am reading an italian grammatic book and I saw that the article 'le' is used specifically for the feminine plural.
By example :
la mamma(singular) --> le mamme(plural)
l'aranciata(singular) --> le aranciate(plural)
But later in the book I can see an example: il ginocchio/le ginocchia
I dont understand why "le ginocchia" as ginochio is masculine and it should be the article 'i' in front.
Does it mean that 'le' is not only used for feminine plural ? Or "le ginocchia" is an exception ?
Thanks in advance,