Final answer:
The root for the word microcyte is 'cyte'. A microcyte is a small cell.
Step-by-step explanation:
The root for the word microcyte is cyte. When breaking down the word, we can see that micro means small and cyte refers to a cell. Therefore, a microcyte is a small cell. The other elements listed, Mic-, -crocyte, and -rocyte, are not the roots for the word microcyte.