Hypertext Webster Gateway: "Bowlder"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Bowlder \Bowl"der\, Boulder \Boul"der\, n. [Cf. Sw. bullra to
roar, rattle, Dan. buldre, dial. Sw. bullersteen larger kind
of pebbles; perh. akin to E. bellow.]
1. A large stone, worn smooth or rounded by the action of
water; a large pebble.
2. (Geol.) A mass of any rock, whether rounded or not, that
has been transported by natural agencies from its native
bed. See {Drift}.
{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.
From WordNet (r) 1.7 (wn)
bowlder
n : a large smooth mass of rock detached from its place of
origin [syn: {boulder}]
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