axis

From Wiktionary

Pronunciation[change]

Noun[change]

Singular
axis

Plural
axes

This ball is spinning on its axis
  1. (mathematics) An axis is the imaginary line that an object spins around. This is the middle of the circle of the turn, and at a right angle to it.
    The Earth rotates once a day on its axis.
  2. (anatomy) The second cervical vertebra of the spine.

Noun 2[change]

Singular
axis

Plural
axises

An axis
  1. A type of deer that lives in Asia.