Relating to caves or the exploration of caves.
Spelean things are about caves and exploring caves. It's like being an adventurer!
Examples:
She is a spelean scientist who studies caves.
The spelean club went on a cave adventure.
The spelean gear is ready for the cave trip.
He wears a spelean hat with a light on it.
The spelean map shows all the secret caves.
The spelean explorer found a new cave deep in the jungle.