axis (plural axes)
- (geometry) An imaginary line around which an object spins (an axis of rotation) or is symmetrically arranged (an axis of symmetry).
- The Earth rotates once a day on its axis.
- (mathematics) A fixed one-dimensional figure, such as a line or arc, with an origin and orientation and such that its points are in one-to-one correspondence with a set of numbers; an axis forms part of the basis of a space or is used to position and locate data in a graph (a coordinate axis).
- (anatomy) The second cervical vertebra of the spine.
- (psychiatry) A form of classification and descriptions of mental disorders or disabilities used in manuals such as the DSM (Diagnostic and Statistical Manual of Mental Disorders)
- (cervical vertebra): epistropheus
- (cervical vertebra): atlas
axis (plural axises)
From Proto-Indo-European *h₂eḱs- (“axis”); see also Lithuanian aszis (“axle”), Sanskrit अक्ष (akṣa, “axle, axis, balance beam”), Ancient Greek ἄξων (áksōn, “axle”), Old High German ahsa (“axle”), and Old English eax.
axis m (genitive axis); third declension
- An axletree, wagon, car, chariot.
- The North Pole.
- The heavens or a region or clime of these.
- A board, plank.
Third declension i-stem.
- Langenscheidt Pocket Latin Dictionary