What is the meaning of Oś?

axle, axletree (transverse bar or shaft connecting the opposite wheels of a car or carriage)

axis

axis (imaginary line dividing a space into two symmetrical parts or running through the center of rotating objects)

axle; pivot (elongated, circular-section part of a machine or device on which other parts rotate or move)

pivot; axis (main theme or element of something)

axis (each of many perpendicular straight lines used to determine the position of something in space)

axis (pact, treaty, agreement, alliance concluded for political or military purposes between two or more states; states connected by such a pact)

axis (perpendicular line drawn along the entire length of the body, starting from the crown)

axis (stem and root of a plant)

bristle (long, shiny hair of a predatory animal)

axis (line of fire extending from the inner point of the firing range, corresponding to the center of the gun's mouth, to the outer point or object at which the firing is to take place)

fastener (screw that tightens a press)

Source: wiktionary.org