She means she is working for a small amount of money. 她的意思是是她工作只有小额报酬。 It is a very different meaning from the main one in the dictionary. 这个意思和字典里面的主要意思非常不同。
That meaning is small nuts that grow on a plant. 字典里的主要意思是长在一种植物上面的小果子。 No one knows for sure how a word for something to eat also came to mean something very small. 没有人确定，一个表示食物的单词也可以表示很小的东西。
But, a peanut is a very small food. 但是花生的确是很小的东西。
