COMMAND OF A WORK
\kəmˈand əvə wˈɜːk], \kəmˈand əvə wˈɜːk], \k_ə_m_ˈa_n_d ə_v_ə w_ˈɜː_k]\
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(Mil.) Relative, the height above a work, in front of it; Absolute, the height above the level of the ground. C. of fire, when an effective fire can be delivered over the heads of the defenders of a work without injury to them; C. of observation, when not.
By Henry Percy Smith
Word of the day
Euclidean Geometry
 geometry based on Euclid's axioms: e.g., only one line can be drawn through a point parallel to another