主轴 Traditional form: 主軸 Pinyin (reading): zhǔzhóu Definitions: axis principal axis (in mechanics, optics, botany etc) main axle (of engine) Characters: 主 - to own; to host; master; host; lord 轴 - axle, pivot, shaft; axis Traditional characters: 主 - to own; to host; master; host; lord 軸 - axle, pivot, shaft; axis