axis
n. countablen. an imaginary line that goes through the center of an object, like the Earth, which it spins around. It can also be a fixed line on a graph used to show where points are located.
n. a real or imaginary line about which a body rotates, or a fixed reference line for the measurement of coordinates. In anatomical contexts, it refers to the second cervical vertebra or the central line of the body or a limb.
The Earth rotates on its axis once every twenty-four hours.
The math teacher asked the students to plot the data points along the horizontal x-axis.
The plural form is 'axes', pronounced with a long 'e' sound (/ˈæksiːz/), unlike the plural of the tool 'axe'.
The earth spins on it's axes.The earth spins on its axis.Learners often confuse the singular 'axis' with the plural 'axes' or use the possessive 'it's' instead of 'its'.