极轴

Traditional form:

極軸

Pinyin (reading):

jízhóu

Definitions:

• polar axis (x-axis in polar coordinates)

Characters:

• 极 - extreme, top; final, furthest, utmost; pole
• 轴 - axle, pivot, shaft; axis

Traditional characters:

• 極 - extreme, top; final, furthest, utmost; pole
• 軸 - axle, pivot, shaft; axis