Wood drifted or floated by water.

Fig.: Whatever is drifting or floating as on water.

Wood drifting in the water or that has been washed ashore.

Wood that has been drifting or floating in water.

wood that is floating or that has been washed ashore

a "Wood floating in or washed up by a body of water"

Driftwood is wood that has been washed onto a shore or beach of a sea or river by the action of winds, tides, waves or man.