01 n. A large stone, worn smooth or rounded by the action of water; a large pebble.
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1.
A large stone, worn smooth or rounded by the action of water; a large pebble.
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2.
A mass of any rock, whether rounded or not, that has been transported by natural agencies from its native bed. See Drift.(Geol.) See: Drift
Phrases & compounds
Bowlder clay —
the unstratified clay deposit of the Glacial or Drift epoch, often containing large numbers of bowlders.
Bowlder wall —
a wall constructed of large stones or bowlders.