1.
a small sac or hollow organ in the body, especially one containing fluid
2.
a very small blister filled with clear fluid
3.
a bubble-shaped cavity in an igneous rock, formed by the expansion of gases trapped in lava and often later filled with minerals deposited from percolating solutions
4.
a cavity filled with air in a seaweed or water plant
1.
a small sac or hollow organ in the body, especially one containing fluid
2.
a very small blister filled with clear fluid
3.
a bubble-shaped cavity in an igneous rock, formed by the expansion of gases trapped in lava and often later filled with minerals deposited from percolating solutions
4.
a cavity filled with air in a seaweed or water plant