a straight line through a body or figure that satisfies certain conditions
the horizontal axis in a plane coordinate system
the third axis in a 3-dimensional coordinate system
the vertical axis in a plane coordinate system
the 2nd cervical vertebra; serves as a pivot for turning the head
the center around which something rotates
a group of countries in special alliance
in World War II the alliance of Germany and Italy in 1936 which later included Japan and other nations
