Hypertext Webster Gateway: "earthwork"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Earthwork \Earth"work`\, n.
1. (Mil.) Any construction, whether a temporary breastwork or
permanent fortification, for attack or defense, the
material of which is chiefly earth.
2. (Engin.)
(a) The operation connected with excavations and
embankments of earth in preparing foundations of
buildings, in constructing canals, railroads, etc.
(b) An embankment or construction made of earth.
From WordNet (r) 1.7 (wn)
earthwork
n : an earthen rampart
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