APSIS n.
One of the two points of an orbit, as of a planet or satellite, which are at the greatest and least distance from the central body, corresponding to the aphelion and perihelion of a planet, or to the apogee and perigee of the moon. The more distant is called the higher apsis; the other, the lower apsis; and the line jo…
ARMS n.
ines, pistols, etc. -- A stand of arms, a complete set for one soldier, as a musket, bayonet, cartridge box and belt; frequently, the musket and bayonet alone. -- To arms! a summons to war or battle. -- Under arms, armed and equipped and in readiness for battle, or for a military parade. Arm's end, Arm's length, Arm…