školjka

1. shell; seashell
   Deca su skupljala školjke na plaži. — The children were collecting shells on the beach.
2. (often as food) bivalve; clams, mussels and the like
   Naručila sam pastu sa školjkama. — I ordered pasta with clams.
   On ne jede školjke ni rakove. — He doesn't eat shellfish.
3. (ušna školjka) outer ear; pinna
   Povredio je ušnu školjku u tuči. — He injured his outer ear in a fight.
4. (of a car, device) shell; car body shell
   Školjka automobila je oštećena u sudaru. — The car's body shell was damaged in the crash.

In Serbia a toilet bowl is usually called "WC šolja" rather than "školjka".