ABERRATION n.
the earth in its orbit, and dairy or diurnal aberration, when of the earth on its axis; amounting when greatest, in the former case, to 20.4'', and in the latter, to 0.3''. Planetary aberration is that due to the motion of light and the motion of the planet relative to the earth.
GRENADE n.
be thrown from the hand into the head of a sap, trenches, covered way, or upon besiegers mounting a breach. (b) A portable fire extinguisher consisting of a glass bottle containing water and gas. It is thrown into the flames. Called also fire grenade. Rampart grenades, grenades of various sizes, which, when used, are…
MECHANICAL a.
neering. -- Mechanical maneuvers (Mil.), the application of mechanical appliances to the mounting, dismounting, and moving of artillery. Farrow. -- Mechanical philosophy, the principles of mechanics applied to the inverstigation of physical phenomena. -- Mechanical powers, certain simple instruments, such as the lev…