A large mass of stone detached from the surrounding land.
A particle greater than 256 mm in diameter, following the Wentworth scale
A large marble, in children's games.
A session of bouldering; involvement in bouldering.
To engage in bouldering.
The molten rock ejected by a volcano from its crater or fissured sides.
Magma.
A shade of red, named after the volcanic lava.