žitarica

1. (usually plural) cereal; grain
   Srbija izvozi mnogo žitarica. — Serbia exports a lot of grain.
   Kukuruz je najvažnija žitarica u Vojvodini. — Corn is the most important cereal crop in Vojvodina.
2. (plural, for breakfast) breakfast cereal
   Deca ujutru jedu žitarice s mlekom. — The kids eat cereal with milk in the morning.

Almost always used in the plural: žitarice.