mechanical bearing

central axis or centerline

scroll (book or painting)

the principal line of symmetry or rotation in mechanics, optics, or botany

a political or strategic alliance between powers or nations

the distance between the front and rear axles of a vehicle

axis of rotation

thread spool

the central shaft for a rotating wheel or gear

to work non-stop; to work around the clock

the most exciting, important, or spectacular part of an event or performance

a line that divides a geometric figure or object into two identical, mirror-image halves

a hanging scroll for painting or calligraphy designed for vertical display

The coalition of nations that fought against the Allied forces during World War II.

a drive shaft connecting the differential to a drive wheel in a motor vehicle

the horizontal rod or spindle at the bottom of a traditional Chinese scroll

the Earth's axis

axis of rotation

pivot; fulcrum

hanging scroll for calligraphy or painting

the vertical coordinate line in a graph or coordinate system, typically the y-axis

polar axis (x-axis in polar coordinates)

axoneme (long thread of nerve cell)

central axis or spindle

the Axis of Evil

The central axis or midline of a structure or geographical area.

(aviation) yaw axis

half of the major axis of an ellipse or the longest radius of an orbit

back axle (of car)

a scroll painting

the last and most important item on a theatrical program

coordinate axis

a person in power or a high-ranking government official

the central line or core around which a structure or body is centered or organized

oblique axes (math.)

the axis in a coordinate system or mathematical graph that represents the dimension of time

a rotating axis, arbor, or spindle in a machine, such as a loom

the positive semiaxis in coordinate geometry

a horizontal axis in a mathematical coordinate system

turboshaft engine