ˈterəˌplān noun
( -s )
Etymology: Middle French, from Old Italian terrapieno, from Medieval Latin terraplenum, from the phrase terrā plenus filled with earth, full of earth, from Latin terrā (abl. singular of terra earth) + plenus full — more at terrace , full
1.
a. : the level space behind the parapet of a rampart where guns are mounted
b. : the level at which a battery is placed whether above or below ground
2. : an embankment of earth with a broad level top