gljiva

1. mushroom
   U jesen idemo u šumu da beremo gljive. — In autumn we go to the woods to pick mushrooms.
   Ova gljiva je otrovna, ne diraj je. — This mushroom is poisonous, don't touch it.
2. (in biology, medicine) fungus
   Kvasac je jednoćelijska gljiva. — Yeast is a single-celled fungus.
   U vlažnom podrumu se pojavila kućna gljiva. — Dry rot appeared in the damp cellar.

For edible mushrooms pečurka is more common in everyday Serbian; a skin fungus is usually gljivice.