EARTHWORK
earthwork
(noun) an earthen rampart
Source: WordNet® 3.1
Etymology
Noun
earthwork (plural earthworks)
Any structure made from earth; especially an embankment or rampart used as a fortification.
Source: Wiktionary
Earth"work`, n.
1. (Mil.)
Definition: 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.
Source: Webster’s Unabridged Dictionary 1913 Edition